Powder for 338 lapua?

Discussion in 'Long Range Hunting & Shooting' started by sniperboy, Mar 24, 2008.

  1. sniperboy

    sniperboy Well-Known Member

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    Hi to all, hope everyone had a good easter.

    Can anyone tell me of a powder that will burn fast enough for a 338 lapua in a 25 inch barrel? I am currently using vithavori n170 but i dont think its burning it fast enough.
    I am using 300g smk projectiles and the rate of twist of the barrel is 1-10.

    Thank you
     
  2. 30-338

    30-338 Well-Known Member

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    Hey Sniperboy...
    I have tried US 869, Retumbo and Viht N-170. The Vihtavuori powder was my go to load and I got good consistency FPS @ 2675FPS ( low spreads etc)...I used 89 grains but I have a 28.5 inch barrel...Now I use Retumbo , 90 g and get about 2750...We switched to Retumbo because we were trying to simplify our loading procedure with fewer powders and using the same powder for different magnun rifles ( Lapua, 30-338, 300RUM ) and we did it! It makes things a lot easier...I think I remeber that Vihtavuori is a temperature "insensitive" powder like the extreme from Hodgdon. BTW Quickload says that with 90 grains N-170 in a 25 inch barrel there remains 1.84% of the powder unburned...IS that why you thought you needed a faster powder or were you meaning a slower powder? Shawn has had good luck using H1000, and has gotten a little less velocity but excellent consistency.good luck 30-338
     

  3. fenceline

    fenceline Member

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    power

    I use h1000 any time i am pushing a heavy bullet seems to work very well.
    good enouf to set a new record.
     
  4. 4xforfun

    4xforfun Well-Known Member

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    I have done load development for 2 different Lapuas. The custom job liked H 1000, the Armalite liked RL 25. We were using 250 SMK and Lapua 250 Senar(sp). Niether one liked to be pushed to fast. Groups tended to open up when I pushed them.
     
  5. BHP9

    BHP9 Well-Known Member

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    92.5gr/H1000 under a 250gr Lapua Scenar or 250gr Lapua LockBase out on my 26" PGWDTI Timberwolf.
     
  6. Lapua Hunter

    Lapua Hunter Well-Known Member

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    Powder for .338 lapua

    I also use RL 25 in myarmalite AR-30...
     
  7. jlamb

    jlamb Well-Known Member

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    Guys,

    I just got a 338 Lapua also. Thanks for the info. I'm going to create a load for elk first with the Sierra 250grn BTSP, then move to the 300 grn SMKs. It sound like H-1000 is the one.

    J
     
  8. BountyHunter

    BountyHunter Writers Guild

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    MRP2 is more consistent lot to lot than RL25 and is great.

    H1000 and Retumbo would be my next choices.

    BH
     
  9. Broz

    Broz Well-Known Member

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    Have you tested MRP2 as far as velocity change in temps from 0 to 80 dregees?

    Just wondering.

    Thanks

    Jeff
     
  10. highridge1

    highridge1 Well-Known Member

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    I have had alot better results with RL25 than H1000. Better velocity,accuracy, and conistent in my 338 edge.In fact the new lots of H1000 are so wacked out I won't touch it again...