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Big 338 powders??

 
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  #22  
Old 05-25-2013, 10:04 AM
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Location: Townsend, Montana.
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Re: Big 338 powders??

Quote:
Originally Posted by idaho elk hunter View Post
. NO LAPUA even if imp version can touch this safely.
Hmmmm, bold statement there. I am fully aware of the capabilities of the 338-378, as well as its shortcomings. I am going off memory here but I believe the 338-378 has an H20 case capacity of around 122 gr. Now if we had a Lapua based case that was equal to it or even a few grains more, would you still stand behind your statement?

Lets not forget the much stronger Lapua brass that can be safely loaded to levels well above the Norma brass. Also the shorter fatter more efficient Lapua case design. Now lets consider the +P throat from Defensive Edge???? I like the 338-378 and have been a Weatherby fan most of my life. But it is possible your post statement is as dated as some of the powders you spoke of. My new rifle in 338 Terminator +P was not something we did on a whim without research.

Just saying,

Jeff
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  #23  
Old 05-25-2013, 10:04 PM
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Re: Big 338 powders??

I have read this thread with great interest. I just bought a 338 lapua weatherby accumark and several boxes of 300gr otm (based on the work Broz did with them).

I want a powder that will get me 2700fps or more with good case life and of course accuracy. I also hunt in cold weather (up to -40) and have always used hodgdon extreme powders in other guns to cover the large temp spread from summer to winter temps.

I am intrigued by rl33 and vv n570 but rl33 has no data and n570 supposedly isn't temp stable. Are retumbo and h1000 my only real options?
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  #24  
Old 05-25-2013, 10:59 PM
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Re: Big 338 powders??

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Originally Posted by busse fan View Post
I have read this thread with great interest. I just bought a 338 lapua weatherby accumark and several boxes of 300gr otm (based on the work Broz did with them).

I want a powder that will get me 2700fps or more with good case life and of course accuracy. I also hunt in cold weather (up to -40) and have always used hodgdon extreme powders in other guns to cover the large temp spread from summer to winter temps.

I am intrigued by rl33 and vv n570 but rl33 has no data and n570 supposedly isn't temp stable. Are retumbo and h1000 my only real options?
H-1000 will do it with ease and will be cleaner than Retumbo.

Jeff
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  #25  
Old 05-26-2013, 07:20 PM
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Re: Big 338 powders??

Thanks. Will start with the Berger data and see if I get where I want to go. Their data is kind of slow.
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  #26  
Old 05-26-2013, 09:33 PM
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Re: Big 338 powders??

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Originally Posted by busse fan View Post
Thanks. Will start with the Berger data and see if I get where I want to go. Their data is kind of slow.
Seat them -.040" off the lands to start. Work up from 88 gr. watching for pressure and when you get to 90 gr you should be close or a bit over.

Jeff
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  #27  
Old 05-27-2013, 10:28 AM
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Re: Big 338 powders??

Thanks for the info.
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  #28  
Old 05-27-2013, 06:33 PM
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Re: Big 338 powders??

Quote:
Originally Posted by Broz View Post
Hmmmm, bold statement there. I am fully aware of the capabilities of the 338-378, as well as its shortcomings. I am going off memory here but I believe the 338-378 has an H20 case capacity of around 122 gr. Now if we had a Lapua based case that was equal to it or even a few grains more, would you still stand behind your statement?

Lets not forget the much stronger Lapua brass that can be safely loaded to levels well above the Norma brass. Also the shorter fatter more efficient Lapua case design. Now lets consider the +P throat from Defensive Edge???? I like the 338-378 and have been a Weatherby fan most of my life. But it is possible your post statement is as dated as some of the powders you spoke of. My new rifle in 338 Terminator +P was not something we did on a whim without research.

Just saying,

Jeff
Hey Jeff,

A friend sent me this today for my TRG-42 LM, I am a Lapua fan because it's a MIlitary round, but it is not even close in capacity to the Wby. which I could care less about, the recoil is already a lot with a 14 1/2 lbs. gun.

Cartridge : .338 Lapua Mag.
Bullet : .338, 300, Sierra HPBT LR MK 9300 G7 Litz
Useable Case Capaci: 92.057 grain H2O = 5.977 cm³
Cartridge O.A.L. L6: 3.681 inch = 93.50 mm
Barrel Length : 27.0 inch = 685.8 mm

I chose to brake in the barrel w/IMR 4350 since Sierra showed in a most accurate, which in my case it was rather accurate, but slow as snails pace; 78 grains only produced 2525 fps but put three out of twenty in the same hole even with cleaning the barrel.

I have on hand H1000, RL 22, 25 and 33, IMR 7828 and 7828 ssc, N170, 780 Supreme and almost anything else except the really slow stuff.... US869, and such. What would you suggest I try for shear accuracy and nothing else, bullet drop means almost nothing. I have 28.5 Mils of scope adjustment even with the 2525 fps 300 SMK round.
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Last edited by longrangehunterII; 05-27-2013 at 07:15 PM.
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