New to loading for 338LM Questions

Discussion in 'Reloading' started by wadedc, Oct 26, 2008.

  1. wadedc

    wadedc Well-Known Member

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    I recently purchased a 338 lapua and plan to work up to 92 grains of H1000 over 300 matchkings in lapua cases and neck size as much as possible. What kind of brass life should I expect and should I anneal necks or will I have loose primers before the necks get brittle?

    Thanks for any advice.

    Wade
     
  2. jwp475

    jwp475 Well-Known Member

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    I shoot 92 grain of H-1000 behind the 300 SMK and I have never loosened a primer pocket. I get 8 to 10 loading before the case splits in front of the head caused by case stretch
     

  3. wadedc

    wadedc Well-Known Member

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    What velocity are you getting and how long is your barrel?
     
  4. jwp475

    jwp475 Well-Known Member

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    My barrel is 31/5" to the end of the brake and I get 2791 FPS
     
  5. wadedc

    wadedc Well-Known Member

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    My barrel is 26" plus the brake do you think H1000 will work well?
     
  6. jwp475

    jwp475 Well-Known Member

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    Yes indeed, H-1000 is an excellent powder choice...
     
  7. wadedc

    wadedc Well-Known Member

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    Thanks for all your help.
     
  8. BHP9

    BHP9 Well-Known Member

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    H1000 is an excellent powder and Retumbo gets an honourable mention here too.

    N165, I found, had too sharp an impulse with 250's.

    IMR4350 is giving excellent accuracy from my 26" barrel.