7mm-08 with 130 Soupcan Gas Checked

[rosewood]

Been surfing around and can't find exactly what I am looking for. Have seen H4895 suggested, but I don't have any of that.
I am using straight wheel weight water dropped and they are coming in at 132grains sizing to .285. I want to use RL15, H322, or H335. How fast can I push these boolits safely? I will be using a 20" barrel. I don't want to push them fast, but for the j-word load data, the slowest I can find is about 2200fps in a 20". I figure on staying on the low end of the load data, but am unsure how fast is doable with the cast. Also, I plan on hunting whitetail with it. Will these GC boolits work up to 2500fps? My Hornady manual shows 139 grain j-words using about 34 grains coming in at 2300 fps I think in a 24" bbl and 2100 in a 15" bbl. I am figuring trying about 33 grains with these to start with. Thoughts? I have noticed most of the manuals I have omit cast boolits and the Lee Manual only has a select few and they are not my weight boolits or powder I have ever used.

Thanks,

Rosewood

[Ben]

Rosewood,

That is FAST for a cast bullet.

I have more than a little concern for your ability to shoot an accurate bullet at those speeds. My results with the Soupcan in two 7 X 57 mm rifles show good accuracy at about 1,800 fps and then " things go south."

My 7 X 57 and your 7 - 08 use VERY similar cast bullet load data. You might like to see my results with my 7 X 57 :

http://castboolits.gunloads.com/showthread.php?240400-A-good-day-with-my-7-X-57

Ben

[rosewood]

Hmm... That is what I was wondering about. I guess I am going to have to go with a much faster powder and slower speed. Now got to find some load data for it in the 7mm-08. The 7mm-08 case has slightly less capacity than the 7x57.

[rosewood]

I had a 93 Mauser in 7x57 and it keyholed everything I shot through it, probably why I got it cheap. Wonder if a well fitting cast boolit would have fixed it? Since I already had 5 other 7mm guns, decided to go with a 6.5 and it is at the gunsmith now waiting on the 6.5x55 barrel to be installed. Might have to try your epoxy paint finish instead of blueing like I had planned.

[GhostHawk]

I suspect a slower powder in moderate volume to bring the speed down is going to be the answer.
4895 is in my opinion a very good powder for cast shooters.

Good luck!

[Ben]

Hmm... That is what I was wondering about. I guess I am going to have to go with a much faster powder and slower speed. Now got to find some load data for it in the 7mm-08. The 7mm-08 case has slightly less capacity than the 7x57.

Yes, the 7 - 08 does have slightly less capacity. If you use suggested starting cast loads for a 7 X 57 mm you won't have a problem however.

Do you have some Unique ?

Ben

[rosewood]

No, never used Unique, and haven't seen any on shelves around here.
Here is what I have:
RL10x, 15, 17, 19, 22, 2400, Varget, H335, H322, IMR4227, H110, H380, H4831SC, Trailboss, Universal, Power Pistol, Bullseye, Bluedot, Longshot.

[Ben]

You could possibly get good results with TrailBoss ?
However I've only used it in limited situations.

[polara426sh]

You might want to load up a dummy round and see if the soupcan will work in your chamber. In my Savage I had to seat that boolit so deep that the check was well below the neck. I decided against trying that particular design in my rifle.

[Ben]

rosewood (http://castboolits.gunloads.com/member.php?37341-rosewood) :

I posted this in 2011, you might like to see it :
__________________________________

I wanted to go back to the range today and re-test the 7 mm soup can with 7.7 grs. of International Clays in my Ruger MK II , 7 X 57 to see if the groups that I fired yesterday were " flukes ."

http://img.photobucket.com/albums/v494/haysb/7%20X%2057%20Synthetic%20Stock/002800x600.jpg


I fired 4 different groups today, seems that yesterday's results were not a fluke.


Some of you that own an accurate 7 mm just may want to try this bullet. MidSouth has the 6 cav. mold ( $36.15 ) now.


http://www.midsouthshooterssupply.com/item.asp?sku=000067MMSOUPCAN


In the targets below, inner circle is .480 ", the outer dia. of the orange is .890".
50 yards, 5 round groups.
Ben's Lube, bullets sized .2862 " with Hornady gas checks.


http://img.photobucket.com/albums/v494/haysb/LEE%207%20mm%20Soup%20Can/001-1.jpg


http://img.photobucket.com/albums/v494/haysb/LEE%207%20mm%20Soup%20Can/002-1.jpg


http://img.photobucket.com/albums/v494/haysb/LEE%207%20mm%20Soup%20Can/003-1.jpg


http://img.photobucket.com/albums/v494/haysb/LEE%207%20mm%20Soup%20Can/004-1.jpg

[rosewood]

You might want to load up a dummy round and see if the soupcan will work in your chamber. In my Savage I had to seat that boolit so deep that the check was well below the neck. I decided against trying that particular design in my rifle.

Seated to 2.6 and clears fine.

[rosewood]

Ben, I am jealous now. Gonna have to do some more light load testing just for fun.

[UBER7MM]

Rosewood,

For 50yds, you might try 19-23 grains of IMR-3031 and a small tuft of Dacron. Make a ladder of incremented loads to find out which works the best in your 7mm08.

I hope this helps.

[rosewood]

Ben, any idea what vel you are getting with that? 1200?? If I can get my 7tcu to do that I will be a real happy cAmper

[Ben]

Ben, any idea what vel you are getting with that? 1200?? If I can get my 7tcu to do that I will be a real happy cAmper

I'm ashamed to say that I don't own a chrony.

If I was guessing, I'd say 1,100 - 1,200 fps.

By the way, I believe if you had enough ammo loaded with that particular load , that the rifle would shoot like that all day long.

Ben

[rsrocket1]

rosewood,
Since the 7-08 is a necked down .308, look at cast loads for .308. I'm having a lot of fun developing loads for the three 30 cal molds I bought this year. I have a 113g soupcan, a 170g flat nose and a 200g round nose. I started loading them with the GC's on, but have recently been developing loads without the GC's. Of the powders you list, Universal for all intents and purposes in rifle is the same as Unique. Bullseye and Power Pistol will perform virtually the same in that cartridge in that they will be 100% consumed within the first few inches of the barrel. 10 grains of Universal should get you about 1500-1600 fps out of your 20" barrel gun with Bullseye a little faster and Power Pistol a little slower. Even though the crimp grooves of my bullets show that I should be seating about 0.4", I seat my bullets to 0.3" so that the base of the bullet stays inside the neck and doesn't hang in the body of the case. Does it matter? It hasn't so far, even with gas checks although I used the Hornady GC's which are crimped on pretty tightly when used with the Lee Sizer.

Start with 10g Universal and work up or down to see if you can get a better group. Here are some test groups I shot last week with various boolits, loads and powders both bare based and GC'ed. I had the scope sighted in for full power 150g loads at 100 yards so most of the 50 yard shots were aimed 2" low except for the 200g shots. I was most impressed with the subsonic 200g bare based load.
117872

[rosewood]

Thanks for the info. Got a handful of 7mm-08 and 7mm tcu loaded up now and have to get to range to try them out.

[TCLouis]

rosewood

Are you using Junior 1942's loads for the 7mm Soupcan in the TCU?

[runfiverun]

the above universal loads will work.
16 grs of 2400 will do the job too.
the h-322 type powder generally does better with a filler [and lowered [10%] h-4895 data can be used] for either 7mm case.
airc I used 21-22grs of h-322 and Dacron to hold it in place and avoid vertical stringing.
and I used 24grs of 4895 without a filler for general stuff.

[rosewood]

rosewood

Are you using Junior 1942's loads for the 7mm Soupcan in the TCU?

Sort of. I don't have any WC820, but have seen it is similar to H110 in some batches, so I loaded up some H110 from my Lyman pistol manual. Didn't get good accuracy with the IMR-4227 I tried. 2400 did well with the 120j-word, but really didn't try much with the soupcan.

I tried H322 with the 120 J-words and it shot well, but the report was ridiculous, sounded like a cannon, that is why I went to 2400 which was much more reasonable.

[quilbilly]

In my 7mmTCU Contender 10" accuracy with the soup can fell off of me at about 1600 fps. but with the 130 gr Lee RNGC accuracy has been excellent a carbine up to 2050 fps. All my loads for this cartridge have been with 4198.

[rosewood]

Ended up using 36.0g of RL15 and have yet to chronograph, was getting a tolerable 1.5" at 100yds. No leading at all. Just took my first deer with it. Clean through double lung with larger exit wound. Destroyed lungs. Bang flop, drt. I am sold on cast :)

[Blammer]

Nice going!