Introducing the THR10-51 aka 40-308

[BT Sniper]

Here are some pics of my new caliber. Well maybe not all mine but certainly a joint project with credit given to those that where gracious enough to help me.

I'm currently loading blanks for fire forming the brass so the post will be short for now but here are some pics to keep you all interested.

A lot more to come!

Till then let me introduce the

"THR10-51" or "400 THR Knockout" not quite sure of offical name yet. I like the looks of both.

http://i636.photobucket.com/albums/uu87/BTSniper/BT-40.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070414.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070413.jpg




Here is alook at all the ingrediants I used for the COW (cream of wheat) method of fire forming cases.
http://i636.photobucket.com/albums/uu87/BTSniper/P1070406.jpg

[DukeInFlorida]

Brian, looks suspiciously like 300 aac blackout, except oversized....

Nice work.

[BT Sniper]

It does does'nt it! I actually got some 300aac brass I'll have to compare next too.

Now that you mention the 300 aac blackout maybe I'll call this one the 400 THR Knockout! :)

BT

[b52fizzle]

What shoulder diameter did you go with, I thought of "copying" the 40/400 whelen but use the .400 bullet with .458 shoulder, like the idea of using the 308 with this shoulder and neck, shooting the heavy for caliber subsonic loads. How do I go about getting barrel chambered, dies made, proper procedure I guess you could say.

[BT Sniper]

Well I'm pretty simple minded about such things. This caliber shown above is nothing more then a standard 308 case necked up to 40 cal.

This cartridge has allready been proven by others and I expect I'll be shooting it a bit this weekend. Don't know what size piece of lead we could throw out the end off the barrel for subsonic loads but a 300 grain 40 cal at 1100 FPS should pack a pretty good wallop if in fact the 40-308 would throw it that fast?? I think the 338 spectra is shooting the 300 grain SMK bullet subsonic and I think it is nothing more then a 10mm case? Yep looked it up, teh 338 Spectra launces the 300 grain bullet at 1,000fps and the parent case is simply the 10mm! This 40-308 I would think has A LOT more case capasity. Bigger bullet??!!!!

As for barrels and chambers, you can pick up 40 cal barrel blanks from many of the custom barrel makers out there. Getting it chambered maybe the difficult part. I maybe looking into having a custom reamer made for the 40-308.

Range tests will come soon!

BT

[BT Sniper]

Fire formed 275 rounds of brass this morning. Now to inside neck ream and anneal again.

I had some duds in my fire forming. Probably 25% of my loads did not fully expand the neck. I could tell the ones that did not get a full burn charge. I think it was because I used the 22 cal cleaning patch rather then a 1/4 square of toliet paper for the wad filler on top of the powder. I might have got some of the COW mixed in with the powder or somthing? Rather then a BANG all I got was a poof.

I used the TP when I formed my 400 BTS mag cases with zero issues and the 22 cleaning patch with the 10-51. It was the only difference so it must have been the cullpret.

Ohwell, off to the shop.

BT

[BT Sniper]

Results from inside neck reaming 250 thick LC pieces of brass.

http://i636.photobucket.com/albums/uu87/BTSniper/P1070431.jpg

BT

[BT Sniper]

Sized, fire formed, annealed 2x, neck reamed, primer pocket reamed, primed, cleaned and tumbled and the resulting 250 40-308s ready to load.

http://i636.photobucket.com/albums/uu87/BTSniper/P1070436.jpg

BT

[BT Sniper]

Finally got a chance to get out and shoot the 40-308 this evening. More like late evening!

I was very happy with the results.

I'll have a full write up soon but at 75 yrds with 189 grain HP bullets made from 9mm brass, loaded with 42 grains of RL-7 powder I got a three shot group of .605 and the 45 grain load went 1.0"

It was getting to dark for the crony to measure FPS but I did get initial readings from my first few shots. Loaded with the same bullet and 44 grains of RL-7 I got an average of 2250FPS.

I loaded some 300 grain bullets I had made for me from comercial jackets and was testing those when it got to dark to measure FPS. The last reading I got was 1948 fps from the 300 grain bullet pushed by 41 grans of RL-7.

I was safely able to load and shoot the 300 grain pills with 44 grains of RL-7, no idea how fast I pushed it though.

I got enough brass now to send off to Hornady to have some custom dies made for me. Shooting a .6 group from the 40-308 was pretty good considering I was using 40S&W dies to load the bullets with :)

Also using the stock "tuperware" Savage fiberglass stock that they say is not good????

Well more to come! It was nice to get out and shoot a bit. Wind was blowing 30 kts all day long till 7pm when I left to go shooting then it finally calmed down.

BT

[Bigslug]

I think you may have just created the ultimate eastern deer cartridge. I really think you've got a winner there.

Now we just need it in a pump action. . .

[b52fizzle]

Not sure why this cartridge intrigues me so, but have been thinking constantly about it. Essentially you have a shortened 400 whelen, which can push a 300-350 gr to 2100-2400fps , comparatively speaking could probably get within 200-300 fps shy of this, with shortened case. Could probably go up to 450-500gr for subsonic use, throat depending.

338 spectre uses the longer 10mm magnum.

40 super can sling a 200gr upwards of 1300 fps, could go 300gr subsonic with this one.

I think I'm combining two threads about this but been following both.

[BT Sniper]

It has been a fun cartridge to shoot. Recoil is pleasent and so far I have been very pleased with the performance.

I took it out the other night shooting milk jugs full of water. With the 225 grain bullet pictured above it smashed threw 6 jugs in a row before coming to a rest. Recovered bullet was 200 grains with a nice mushroom. With the 190 grain HP I got explosive expansion and bullet was stoped in 3 jug. Recovered weight was only 80 grains. It was AWESOME! Just what you would need to make a BIG hole in bad critters.

I don't know how fast I could have pushed 300 grain bullets, I got 1948fps with 41 grains of RL-7 and loaded up to 44 grains. Maybe close to 2100-2200 FPS with the big 300 grain pill? I have a short 18" barrel too, not sure if a longer one would benifit in FPS with this case?

I have a 1-16 twist and not sure how slow and how heavy of bullet I could stabilize. I'm sure I got enough throat to shoot a +400 grain bullet. I bet I would have to load it down a little to keep it sub sonic. Your probably pretty close to my guess too with a 450-500 grain bullet sub sonic. Wonder how big the 458 socoms are shooting?

I'll have some more accuracy testing this summer I'm sure. For now .6" at 75 yrds with 190 grain pistol bullets made from 9mm brass is a pretty darn good shooter. That was my goal with this gun, to be able to shoot a lot of my favorite caliber bullets at increased FPS vs. the most powerful 40 cal pistol and still be able to enjoy shooting it a lot. If I want to go bigger, badder and faster, the 400 BTS MAG is always availble.

Good shooting and swage on!

BT

[BT Sniper]

I'll have to get a pic posted of the "full power" live fire formed brass. The shoulder is much more defined then in the previous pics.

BT

[b52fizzle]

Was wondering about the shoulder sharpness myself just last night, did you just use a 308 reamer then neck with 10mm reamer, then throat? 458 socoms believe run a 500-600gr on the heavy end, I saw a 600 gr bronze solid in one on here some where looked nice. Thought about this one myself, but I am looking for a heavy medium range that has easy to find brass, and a caliber nobody else has, plus if possible can use the same swage dies to make .400's for my 40 super when I get that built.

[BT Sniper]

I didn't cut the chamber, I had a more knowledgeable friend of mine do that. I do expect I may have a custom reamer made in future if intrest and demand deems it.

I'll get a pic of the good looking shoulder as soon as I can.

BT

[a.squibload]

Also using the stock "tuperware" Savage fiberglass stock that they say is not good????BT

Yeah, and it looks awful, you should sell it to me!:smile:

Would your knowledgeable friend be interested in reaming another barrel?
(He might get a few hits on that from here.)
Who else would cut a chamber?

What's a price range to look for on a 40 cal barrel?
I've never ordered one, would a specific cartridge designation be necessary
or advised?

You got me all fired up here.

PS: Fire-forming, long ago a friend would cast 7mm boolits to fireform 7mm TCU
cases in his TC, at low power of course. More work but maybe higher percentage
of good ones? I guess if they come out close with COW, the next firing with a
boolit in it would make 'em just right. OK never mind.

[BT Sniper]

Any of the barrel makers out there offer a 40 cal .(400) barrel. A lot under $200, jsut need it chambered. I bet if intrest was enough I could possibly have a custom reamer made for the 40-308. That would certainly make the job of cutting the chamber a lot easier. Then too if intrest permited I bet we could get a package rate from one of the suppliers. We could go as far as providing them with the reamer and they could cut the chamber.

Just a quick search turned up these guys. Of course there are severial other even better quality barrel makers out there. http://www.mcgowenbarrel.com/catalog7.htm

Savage actions are the way to go IMOP for ease of assembly without a gunsmith needed but a bit of common sence is a must. Not difficult and a lot of fun. Once you know how to rebarrel the savage action you all of a sudden find yourself with a safe full of extra barrels. I must have a half dozen or more all ready in varous calibers.

I'm sure we could make it happen for those that may be interested. After all anything is possible and the 40-308 is a good one in my book! :) Especially since I am shooting the same 40 cal bullets now in both my riffles and pistols.

BT

[a.squibload]

If looking for a Savage 110
I guess the bolt face (diameter, extractor) should be
for a 308 or very similar cartridge.
(Barrel will be replaced anyway.)
I'm no expert on rifle cartridge similarity,
what cartridges would use the same bolt face as 308?

Saw a couple used 110s in 308.
There seem to be quite a few 30-06s available used.

[BT Sniper]

.473 bolt face is comon. 243, 260, 308, 30-06, 270, 280, so on and so on. I'm sure a short action will work best for the 40-308 so look for a savage 10, 11, 12 model etc. The 110 or 111 or 112 etc. anything with a three digit sufix is a long action. The two digit models are short actions.

Use a donor rifle in a caliber you might want to shoot again some day or just what ever happens to be a good bargin. I used a 243 savage model and plan to use the 243 barrel for testing new bullets some day.

I drew a NE Oregon deer tag again this year. Guess what new gun I may be taking out after them this year. :)

BT

[a.squibload]

Uh, a flintlock pirate pistol? (AAAAAARH!)

Thanks, I had a feeling you would have mentioned that
if it was critical. I'm trying to make it harder than it
really is. As usual!

[rda72927]

I would belive that any Savage model with a .473 bolt will work. I have a 112 that is in 22-250. It is a long action, but I could put a 243 or 25-06 barrel on it.

[BT Sniper]

40 cal 225 grain bullet made from 9mm brass recovered in 7th milk jug after smashing threw the first 6. Recovered weight was 200 grains!

http://i636.photobucket.com/albums/uu87/BTSniper/P1070577.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070579.jpg


Here is a look of the shoulder of the fired case. Everyone seems concerned but it has been "Good To Go"! I polished the one on the left to see if it took better pic?

http://i636.photobucket.com/albums/uu87/BTSniper/P1070581.jpg

Good shooting and Swage On!

BT

[BT Sniper]

Spoke with my custom reamer shop. I think I'll have a reamer made for this 40-308 very soon! Probably even get a FL sizing die reamer made so I can offer reloading dies for this caliber as well.

We shall see!

BT

[BT Sniper]

Deer hunting season is a little over a month away and I was brousing the thread here and got to thinking. I allready figured I was going to possibly use my 40-308 for this years season and I took a look at the load data I got. I was able to push a 300 grain bullet over 2000FPS! Don't exactly know how fast just yet but I'm sure it is no more then 2200FPS at best, well my family has been hunting NE Oregon mule deer for years using the trusty old M94 Sweed 6.5x55. I have taken a few myself with it. You know it doesn't push a 140 grain bullet more then 2500FPS. Hummm????? 300 grains at 2200FPS or 140 grains at 2500 fps?????? Yeah I know the .264 bullet has better SD and BC but when most shots are under 100 yrds? Well now........ the 40-308 looks pretty good.

Hopfully I'll get some time to go out and practice with her a bit and keep you all posted.

Good shooting and Swage On!

BT

[MIBULLETS]

Go for it BT! That cartrige should be an excellent short to medium range deer/elk thumper.

[lukewmtdew]

May I'm just used to pistols but why is the crimp grove seem so low on the bullet?

[BT Sniper]

My thinking was to lock the core in place without bonding it. Check out the pics.

http://i636.photobucket.com/albums/uu87/BTSniper/P1070432.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/crimplock.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070577.jpg

And it actually isn't seated very deep either

http://i636.photobucket.com/albums/uu87/BTSniper/P1070414.jpg

[lukewmtdew]

Those are sweet

What tool do you use to get the cross section?

The dies I have setup for 40 would work for that correct? I would just need a bigger core and it looks like you have a round nose what else needs to be changed on the dies I have?

I spose setting up a 243 wouldn't be too bad for that caliber how much would a gunsmith charge to put on a different barrel you spose?

[BT Sniper]

Lets see.....

1. I used the mill to cross section. Before that it was a hand held grinder with the bullet ina vise and a lot of sand paper.

2. I used CH dies and a round nose punch, not perfect but good. I really think a simple flat point would work well too in the 40-308. I used a 158 grain .358 core and got a 225 grain bullet.

3. The 243 is simply the 308 necked down and the 40-308 is the 308win necked up, all the same case just different caliber.

I don't know about GS fees but I do know owning a Savage rifle is fun, you can swap the barrels yourself, if your smart enough to swage bullets you can swap a savage barrel. A good custom barrel could be as simple as $250 it is the chambering that is the trick. There are not any 40-308 chamber reamers out there...... yet :)

I think it is a heck of a cartridge with a lot of potential. The bullets are certainly easy to make as we all know :)

BT

[lukewmtdew]

So I'm correct in assuming its just a barrel switch? Like going from 10mm to 9x 25 dillon or 40 to 357 with just a barrel change in a semi auto pistol but in a bolt action rifle? Can you switch your savage back and forth? Which savage? My buddy just bought an axis seems like not too bad a rifle for 300 scoped I think there's a model with the accu trigger for aroun 400 scoped?

[BT Sniper]

Yes with the savage it is just a matter of switching the barrel as long as you have the same bolt face for the caliber you are shooting. The bolt face swaps easily too. You still have to set the proper head space for the cartridge and have a decent barrel wrench and/or a action wrench. A few additional tools to add to anyones shooting colletion but it adds a bit more satisfaction and pride when you put the barrel on yourself and then it shoots well too.

Go with any of the savages with a barrel nut on it, IMOP Skip their cheap axis or edge versions. Even a Stevens works well. The Stevens action is simply the older Savage 110 or 10 actions. Three digit identifiers like teh 110, 111, 114, 116 etc are all long actions and teh two digits are short action. Look for a short action with the 40-308 like the savage modle 10, 11, 12, 14, 16 etc. any of those would be a good donor action for teh 40-308, The stevens as well though I don't think they number the modles the same.

You could get any caliber to start with but teh .473 bolt face of teh 308 family would be the best to start with ie. the 243, 260, 6.5-285, 284win, or 308win. Get one in a callliber you will also like to shoot some day so all you have to do is swap the barrel back and forth. I got a Savage model 11 243 win for my 40-308 and a stevens 300wm long action for the 400 BTS MAG.

It's all a lot of fun. A few more dollors but it's a hobby, there are worse things we could spend or money on.

BT

[sly mantis]

Wow this is very cool. How long before you think you'd have a the reamer to be able to cut these barrels? And do you have any accuracy results, id like to see how these can do out a bit farther (farthest range around here is 300 meters)

Found these 40cal barrel blanks for $33, wonder how much it would cost to have it machined and threaded for a savage action.

http://www.gmriflebarrel.com/barrelblanksround/175-round-rifle-barrel-blanks/40-cal--10mm-raw-round-barrel-blank-1-x-20

Also what's the cost of one of the one step 40cal swage dies?

[rockrat]

BT, don't forget you can also get barrels for a Remington action, setup to use a Savage type nut. They call it a Rem-age setup.

Jut put a 24" varmint weight, 300 Blackout barrel (Mcgowen) on a Rem 700 action and set headspace. Took me all of about 10 minutes at the most. Only drawback, is that you have to open up the stock a bit, for the Rem-age nut.

[b52fizzle]

Wow this is very cool. How long before you think you'd have a the reamer to be able to cut these barrels? And do you have any accuracy results, id like to see how these can do out a bit farther (farthest range around here is 300 meters)

Found these 40cal barrel blanks for $33, wonder how much it would cost to have it machined and threaded for a savage action.

http://www.gmriflebarrel.com/barrelblanksround/175-round-rifle-barrel-blanks/40-cal--10mm-raw-round-barrel-blank-1-x-20

Also what's the cost of one of the one step 40cal swage dies?

Been very interested also in this, think BT is working on loads it will kinda of be up to you for load development no big name mullah goin into this like the 300 AAC Blackout.

And I don't believe those barrels will.work already thought about it, only 1" od not enough for threads, believe it is for pistol cartridges and not sure if 20" will finish out long enough for a rifle.

BT has a sticky with his pricing and products.

[BT Sniper]

Went out shooting. Got some good numbers.

http://i636.photobucket.com/albums/uu87/BTSniper/P1070903take2.jpg

46 grains RL-7, LC brass, CCI large Riffle primer, my 223 grain (not pictured) ballistic tip!

2360 FPS average

4 shots went .8" @ 100yrds 5th shot took it out to 1.5"

50 yrds it is a one hole gun

160 yrds it did 2.5" for me

I ran the numbers for my bullet in the JBM balistic calculator

here is what I got.

BC .210

sighted in at 100 yrds

2784 ft/lbs of energy at muzzel
2404 ft/lbs at 50yrds .3" high
2066 ft/lbs at 100 yrds 0"
1767 ft/lbs at 150 yrds 2.2" drop
1505 ft/lbs at 200 yrds 7.0" drop
1278 ft/lbs at 250 yrds 14.4" drop
1084 ft/lbs at 300 yrds 25.0" drop

Seems like this will be an good short to medium range small to medium game round. Within 200 yrds should do very well and could probably stretch to 300 at max.

Now to practice!!!!!

Pictures to share soon.

Good shooting

BT

[BT Sniper]

Found out it may actually be easier and possibly better to make the 40-308 cases from 30-06 size brass. I'll post pics later but the process is easier and requires no fire forming. Ofcourse you have to trim/cut the brass to length but that is easy! Far easier then fire forming 308 brass unless you allready have a lot of loaded 308 rounds.

I posted some pics of my latest range trip in my "new hunting bulelt thread"

Good shooting and Swage On!

BT

[Thetraveler]

that is a sweet round BT. Would be an exceptional brush bullet for bear hunting as well I think. I do love my Marlin 444 for that stuff. 30-06 does sound easier, I don't have any 30-06 around anymore are they long enough that the cut is fully below the shoulder?

[BT Sniper]

Depending on how long the GS cuts the neck in the chamber, the 30-06 cut right at the shoulder gives you a 40-308 case the same length as a necked up 308win case.

Looking threw the reloading manual trying to find a round the 40-308 most closly matches in performance, shooting a 225 grain bullet at 2360FPS, the 444 marlin is a pretty close match numbers wise. Not bad from a 308 size case I guess. Yes it would seem like a good brush gun for bear as well.

BT

[Thetraveler]

I like the Hornady 265 Gr for my 444 only 44 bullet designed for the 444 specifically and a damn good hunting bullet. some of the earlier stories from when the 444 came out is the jacket separating from the core on some of the 44 bullets due to the higher velocity of the round. Not sure if that still applies as I only shoot the 265 in mine.

Einar

[BT Sniper]

Here is the recovered bullets from this weekend's range trip. 223 grains @ 2360 FPS Recovered from wet newspaper 15-18" of penetration recovered 150 grains average weight.

http://i636.photobucket.com/albums/uu87/BTSniper/P1070944tk2.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070949tk2.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070947tk2.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070946.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070930.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070939.jpg

http://i636.photobucket.com/albums/uu87/BTSniper/P1070928tk2.jpg

[DukeInFlorida]

What!!??

You didn't find any of the plastic tips?

:kidding:

They look great Brian!

[BT Sniper]

Good one! I'm sure they where in the wet newspaper somewhere :)

BT

[BT Sniper]

Got the 40-308 ready for this weekend's start to deer hunting season.

Here is a 120 yrd group with my 223 grain custom bullet made from 9mm brass and a swaged airsoft BB plastic tip. Group measured 1.5" and is plenty accurate for close to mid range deer hunting. I used reformed 30-06 brass for the case and a load of 46 grains of RL-7 powder. 2360 FPS

http://i636.photobucket.com/albums/uu87/BTSniper/P1080004.jpg


Here is a 200 yrd group of 3.25" again plenty good to take down a deer. The wind probably got the better of me as you can see the group was 3" wide yet only 1" varition in vertical spread. I was very pleased with the results and I'm sure I'll get better groups in future.

http://i636.photobucket.com/albums/uu87/BTSniper/P1080007.jpg


Now to see if I can find a big buck.

Good shooting and swage on!

BT

[rodman68]

Got an idea how about a 400 WSM?

[BT Sniper]

I considered it. I had more 300WM cases though and my GS had teh reamer so I went with the 400 Win Mag aka the 400 BTS MAG!

Here is a pic of my 40-308, the 400 WSM and my 400 BTS Mag. The shoulders are a bit funny looking only because I didn't really have any dies to make the shoulders pretty.
http://i636.photobucket.com/albums/uu87/BTSniper/P1060909.jpg


Check out the 400 BTS MAG thread!

http://castboolits.gunloads.com/showthread.php?t=148885

Swage On!

BT

[DukeInFlorida]

You know what I find interesting about this one...........

Everyone gets all bend out of shape wanting long ogive bullets for necked rifle cartridges.

The success of these for Brian proves that even "pistol" shaped bullets will perform very nicely in this cartridge assembly.

I wouldn;t worry about the shoulders, Brian. You and I both know that they will finish fireforming nicely, and be perfect for your chambers.

Good work, buddy!

I am sitting here, recovering from tumor surgery on my spine, wishing I was off shooting......... I am living through your success. Keep making us proud!

[BT Sniper]

Thanks,

This 40-308 has been fun for sure. Riffle caliber performance from easy to make 40 cal bullets from 9mm brass. PRICELESS!

Your derim die went out in today's mail. Watch for it to arrive Wednesday or at the latest Thursday.

Get well soon.

BT

[runfiverun]

i don't think duke is home just yet.
get better duke.

[DukeInFlorida]

Actually, I am home.

Radiation begins Wednesday on the surgical site, for two solid weeks, and then six months of chemo.

[plus1hdcp]

Off topic but get well soon Duke

[a.squibload]

Re-reading this thread again, considering the money I don't have to spend
on "fun" stuff, I realize I've been telling my friends about it and maybe
it's just the right thing to do! Might have to be step by step though.
And I'll probably feel guilty.

To swage the longer "rifle-type" boolits with my .40 BT dies all that's needed
is a new punch to replace the HP punch? I didn't look at the BT thread to see
if they're available.

BT, you said something about aluminum BB noses instead of airsoft?
Got pics, or did I miss it? Can't remember what thread that was.

Have to look at Armslist again, see if I can find a 2-digit Savage...

[Rusty Goose]

Giving this thread a bump. Any more news on the .40-308?

Rusty

[BT Sniper]

I love it! Low recoil, 2700 ft/lbs IIRC. 2450 fps with 225 grain bullets. I don't get enough time to shoot it! I missed my deer at 235 yrds running last year :( I shot a 1.75" gorup with 225 grain bullets with it at 300 yrds last year! Best cases are formed for me from 30-06 brass. It is a great gun for close range medium size game or fun econimical shooting with bullets made from 9mm brass.

I need to get out and shoot it some more. I wish it was legal for 100 yrd shooting matches, it is pretty darn accurate, not a benchrest bun but it would be funn to get a good score with such "funny" lookign bullets :)

Let me know if you have any questions.

[Silvercreek Farmer]

Think it would work on AR 10 platform? Have you tried any cast boolits?

[Spanners]

What you have there is a '10mm Madness' as I know it
Circa 2006 is when I 1st saw the pics

Wheres the 'dead stuff' pics? :D

[BT Sniper]

I missed the deer last year. No pics :( Thought I might shoot a few sage rats with it :)

BT

[sawzall]

Anymore updates on reamer or dies for this? I have a spare .243 Stevens and about 500 OF 30-06 brass to play with :D

[lmfd20]

I wonder if you could short chamber this for an ar15 barrel? It would be like a skinnier 40cal 458socom.

[Jupiter7]

You know forty-ought six(40-06) has a nice ring to it. I'm waiting/ watching for the dies and barrels if you get that far with it. Nice project!

[BT Sniper]

So many things on my plate at the moment. I would love to offer custom chambered barrels someday, especially this 40-308 or 40-06. I'll need to catch up on my back order of swage dies first.

Need to get out and shoot this one a bit more too!

I'll keep you guys posted should somthing change.

BT

[junkman1967]

Love this round. Great work.

I am in the process of a wildcat myself based on a shortened 06 case with a .429 projectile. I had a custom reamer made by Dave Manson. Hopefully as soon as the weather cools down here in the desert, I can get back to tinkering.

[BT Sniper]

some pics that go with this thread......

https://i.imgur.com/lFX6udGl.jpg


https://i.imgur.com/juDtxeyl.jpg
300 yrds!


https://i.imgur.com/5h5DZQPl.jpg


https://i.imgur.com/3R1UjgNl.jpg


https://i.imgur.com/h8KupGHl.jpg


https://i.imgur.com/brQdZ5fl.jpg


https://i.imgur.com/XBxzVTel.jpg


https://i.imgur.com/WtlQksNl.jpg


https://i.imgur.com/9E2CJ7yl.jpg


https://i.imgur.com/tuIg4url.jpg
22lr, 5.7x28, 300 AAC and my 40-308

[BT Sniper]

https://i.imgur.com/aogPlODl.jpg


https://i.imgur.com/lE7u7nNl.jpg


https://i.imgur.com/bbuO5Fql.jpg

[nun2kute]

Any more development of this cartridge ? AR barrels anywhere ? I got an itch ...

[Plate plinker]

Thread the Barrel and suppress the round. Seems that could be a load of fun.

[marcusp323]

I like it. Kinda reminds me of a 35 Rem on steroids. Might be getting another itch I'll need to scratch :-O
Mark