Lee 155 gr 2r not workign for 300 BO.

[zarfxo]

Hi, this is my first post here. I have been lurking for years. I am new to reloading 300 BO. I already have the Lee 155gr2r mold for casting for 7.62x39. I decided to try it for the 300. my problem is, that I have to seat the projectile way to deep to get it to chamber. any longer and it wont chamber in my rifle, and it wont fit in my EGW chamber checker. I don't think this bullet will work. does anyone have any good suggestions for currently manufactured molds that will work? I am wanting a mold for supersonic rounds. I don't have any plans right now to suppress. I also prefer a gas check mold if possible. I also powder coat. thanks in advance, for the help! The round on the right is the OAL that the book calls for. the round on the left is what it takes to get it to chamber. can measure it because I squished the tip

166787

[dudel]

I have this one http://www.titanreloading.com/molds/bullet-molds/30-cal/lee-dc-mold-tl309-230-5r for 300BO. However at it's weight, I'm not sure it'll go supersonic.

[popper]

From the ring on the nose, I'd say 0.1" deeper. I'm pushing the 31-142C to 2100 but it's PB. You could order it with a GC shank & specify your dia., length to get the weight you want. It's a custom mould, email Tom & spec what you want. Delivery is pretty fast. More $ but it works. IIRC, R5R ordered a mould specifically for the BO in that weight range.

[zarfxo]

I saw that on a google search and got excited. I then saw the weight. I do not think it could be driven fast enough either.

[zarfxo]

the ring on the nose is from my Lee seating die. it seats in both my barrel and chamber checker now, but I'm afraid of the pressures with it being so deep.

[Artful]

Or see your gunsmith see if he has
http://pacifictoolandgauge.com/3756-large_default/19-cal-neck-throat-reamer.jpg
30 cal throating reamer
or if your mechanically inclined just rent it yourself
http://www.reamerrentals.com/searchresults.asp?cat=25

$17 for 3 day rental
http://www.reamerrentals.com/ProductDetails.asp?ProductCode=30%2Et

Then move the throat to take the bullet where you want it. As Goodsteel said


Educate yourself on how to use this tool. It takes a certain amount of feel and a deft hand. It's all good unless you really don't care what it feels like and you ream your throat too deep. The barrel may still group for you, but you'll never touch the throat if you go too far.

[zarfxo]

I am going to be away from electronics for a while today. don't think me rude guys, ill be back later today to check in. I live on a shooting range, and have to go do some RO'ing

[6622729]

Hi, this is my first post here. I have been lurking for years. I am new to reloading 300 BO. I already have the Lee 155gr2r mold for casting for 7.62x39. I decided to try it for the 300. my problem is, that I have to seat the projectile way to deep to get it to chamber. any longer and it wont chamber in my rifle, and it wont fit in my EGW chamber checker. I don't think this bullet will work. does anyone have any good suggestions for currently manufactured molds that will work? I am wanting a mold for supersonic rounds. I don't have any plans right now to suppress. I also prefer a gas check mold if possible. I also powder coat. thanks in advance, for the help! The round on the right is the OAL that the book calls for. the round on the left is what it takes to get it to chamber. can measure it because I squished the tip

166787

Something is wrong. I use this bullet in 300AAC and it's truly been a no brainer. What are you sizing it to? I'm using .309 and tumble lubing. It has been perfect from the first time I tried it. Lee C312-155-2R from straight clip on wheel weight allow or a little harder using 6:1 COWW / Monotype. Both work fine. I'm pushing these at just under 1900fps.

[6622729]

Hi, this is my first post here. I have been lurking for years. I am new to reloading 300 BO. I already have the Lee 155gr2r mold for casting for 7.62x39. I decided to try it for the 300. my problem is, that I have to seat the projectile way to deep to get it to chamber. any longer and it wont chamber in my rifle, and it wont fit in my EGW chamber checker. I don't think this bullet will work. does anyone have any good suggestions for currently manufactured molds that will work? I am wanting a mold for supersonic rounds. I don't have any plans right now to suppress. I also prefer a gas check mold if possible. I also powder coat. thanks in advance, for the help! The round on the right is the OAL that the book calls for. the round on the left is what it takes to get it to chamber. can measure it because I squished the tip

166787

Something is wrong. I use this bullet in 300AAC and it's truly been a no brainer. What are you sizing it to? I'm using .309, tumble lubing and seating to the crimp groove. It has been perfect from the first time I tried it. Lee C312-155-2R from straight clip on wheel weight alloy or a little harder using 6:1 COWW / Monotype. Both work fine. I'm pushing these at just under 1900fps. How are you damaging the tip like that?

[zarfxo]

I first tried them as .311, then I bought a .309 Lee push through. it actually sizes to 308.5. I have been using 50/50 wheel weights and pure lead. hornady gas checks. Hornady cases. what OAL do you seat to with the Lee bullet? maybe the Powder coat is adding to much to the nose?

[Artful]

Well try one without powder coating - What's the nose size of one you have already done?

[6622729]

I first tried them as .311, then I bought a .309 Lee push through. it actually sizes to 308.5. I have been using 50/50 wheel weights and pure lead. hornady gas checks. Hornady cases. what OAL do you seat to with the Lee bullet? maybe the Powder coat is adding to much to the nose?

Im seating to the crimp groove. I don't even measure them. In regards to powder coat, do you size afterwards?

[sgtroha]

I had many a mini stroke trying to gas check powder coated. I had to go to a larger size gas check. Vulcanchex.com will send you a sample pack of 4 sizes for $1.50

Sent from my SM-N910V using Tapatalk

[rda72927]

As stated in other posts, I using a 173 gn Lyman 311041 lubed and GC'ed (originally for 30-30) behind 15.0 H110 running 1750 fps. It is looks short but cycles and shoots great out of the 2 BKO's we have.

[GooseGestapo]

I think your problem is the case necks. I've had one reformed .233 that had a too thick neck and wouldn't chamber with a .311" Lee 155gr ptgc loaded.
But, it could be the throat is too tight for the coated boolits. My .300 throat shows rub marks on tumble lubed bullets. Haven't tried coated in it yet.

[zarfxo]

I am planning to do just that. they were working so well in 7.62x39 and 30-06 that I powdered them all. time to cast some more.

[zarfxo]

yes I size before coating to seat the check and then after coating to get back down to .309

[zarfxo]

okay thanks I will check that mould out.

[zarfxo]

the ones I have loaded so far have been in hornady and barnes 300 BO factory cases. I have been forming my own already, but haven't tried loading with them yet. one less factor to start with.

[zarfxo]

oh okay I gotcha drift now. yes it is seated about .1 deeper than the book calls for. when my gas block comes in I will give this boolit a try anyway. start at the bottom charge and see what happens. with it seated deeper like the one on the left it chamber fine and fits in my chamber checker. ill check the neck of a loaded round just to be sure.

[zarfxo]

I have been checking before coating. the extra step sucks, but I tried it afterwards and that was a no go.

[rockshooter]

I had the same issues and went to the NOE version of 311414. The nose portion measures .300 so it doesn't jam into the rifling. Check the NOE site for a drawing of the bullet
Loren

[Boolseye]

Just giving this thread a cursory look I'm inclined to think case neck too. Some .223 cases can't be converted to 300 AAC because the case necks are too thick. If memory serves, anything over about .013 will cause problems (this is measuring the new blackout neck thickness, after trimming).

Assuming your cases are OK, that bullet is tried and true in that format. Obviously it needs to be seated far enough in to allow for proper cycling. Since good CB loads in the 300 Blackout are so much lower than jacketed for the same weight, overpressure won't be an issue in most cases. I shoot the Ed Harris TL 312-160-2R, less popular than yours for the Blackout but still a great shooting boolit. My OAL is 1.980" over 16 gr. RL 7 or equivalent. Somewhere around 1800 fps, cycles fine, accurate. Sized to .309" always. Apologies if I'm repeating what others have said.

[zarfxo]

thanks rockshooter, I was just looking at that exact mold the NOE 311414. also thanks to everyone else that added good info. the weekends are always pretty busy for me. living on a shooting range and all. when things slow down I am planning on casting a few more from the Lee mold that I have. gonna load some uncoated and see what difference it makes. there is also another member here that shoots at my place. he has one of the NOE molds. I'm gonna try and snag a few projectiles from him to try. I'm real close to pulling the trigger on the NOE 311414, also. sooooo I'll keep checking in and reporting back with progress.

[zarfxo]

well I got a surprise today. the rest of my rifle parts delivered early. I put it all together and loaded up 5 test rounds. Barnes 300BO cases, CCI, SR primer, 14gr of RX7, and I seated some .309 Lee 155gr boolits to 1.944. they chambered well and the rifle didn't explode causing me to bleed out on the range table. they grouped well at 25 yds, but seemed a little lethargic. I will now start increasing the powder charge. I still want the NOE 150gr mold, but its nice to have something to play with while I wait for it to come in. thanks again for all the suggestions people!

[Jupiter7]

It is the powder coating that was causing the issue. I've run into this issue with almost all my .30 molds with close to bore or bore riding diameters. The only one that didn't need any adjustment was the 311-291.

[6622729]

It is the powder coating that was causing the issue. I've run into this issue with almost all my .30 molds with close to bore or bore riding diameters. The only one that didn't need any adjustment was the 311-291.

It has to be the coating. This boolit is fantastic in 300AAC. I went to the range again this weekend and was 1 moa @100yds off my shoulder (rested on the front) with the Lee C312-155-2R using 15.5gr W296 powder, .015 copper gas check, tumble lubed with 45/45/10 and #41 CCi mil-spec primer. Boolit is loaded in mixed brass to the crimp groove and light to medium crimped with Lee factory crimp die. I only shot 15 rounds because there was nowhere to go but to open up the group. Lol. That was an exceptionally good day for me but real none the less. I'm running a little harder than WW alloy though WW alloy straight worked ok too. I hardened them up a little for less scraping when they load.

[zarfxo]

yeah I have come to the same conclusion. it is the coating adding an extra thousandths or two. I got them to work Saturday seated to 1.944, I loaded some more yesterday with more powder and I am going to work up my load today. first the Wife and I have about 13 dozen eggs to pickle and can. then gun stuff.

[Boolseye]

There definitely isn't a lot of room to spare in any direction with this cartridge. Has to be one of the most efficient 30 cal. cartridges out there-the way the 9mm is for pistols. Lot of energy per grain of powder.