confused with velocities very confused

Discussion in 'The Basics, Starting Out' started by foreign, Sep 4, 2010.

  1. foreign

    foreign Well-Known Member

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    ok so i have a savage with a 26" douglas barrel in 7mm wsm and a remi 700 308 23" factor barrel
    remi shooting 168amax 7mm 162 amax with both just at the lands in getting more velocity out of the 308... yes i know something is wrong with that. here are the specs for each
    7mm wsm
    winchester brass unfired
    primer Remi LR ( non magnum, this is probably the problem but i dont think a mag primer will add 200fps)
    base to ogive 3.204"
    ar2225 powder ( RL 25 is the same i think)
    66gr=2723fps
    67=2779
    68=2778
    69=2865

    308
    remi brass trimmed to 2.020" (fired)
    winchester LR primer
    base to ogive3.276
    ar2208 (same as varget)
    44gr=2672fps
    45gr=2754
    46=2784
    47=2868

    so you see the problem i have. doesnt make alot of sense to me.
    so help please...
     
  2. johnnyk

    johnnyk Well-Known Member

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    The velocity for the 7WSM does seem a bit slow. I looked on reloadersnest.com and there is one load for a 160gn Sierra bullet with RL25. The guy is using 75gn of RL25, Federal 215 primer and getting 3125fps from a 25" barrel.
    If you aren't getting any pressure signs, try bumping the charge up a .5gn at a time, lookiing for pressure and accuracy nodes. You should be getting at least 3000fps. JohnnyK.
     

  3. RockZ

    RockZ Well-Known Member

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    In the 7WSM with 162 Amax my accuracy load is 3030fps with a 26" barrel using H1000.
     
  4. foreign

    foreign Well-Known Member

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    Rockz is that with mag primers?
    Johnnyk I agree it's slow. Very slow. With increasing the powder I've actually been up to 70.5grns and speed didn't increase much plus it's a compressed load. Enough so that the neck tension would have to be increased to stopmthe bullet pushing out with more powder.
    Forgot to mention that the barrel is brand new
     
  5. jimbires

    jimbires Well-Known Member

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    I just ran a 7mm wsm in my quick load . a 162 A max with 69.0 grains of Reloader 25 ( 105.7% filled case ) has a velocity of 3127 FPS . 69.5 grains is a dangerous load . my quick load does not have AR2225 listed . so I'm guessing that AR 2225 is NOT the same as Reloader 25 . Jim
     
  6. foreign

    foreign Well-Known Member

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    Hmm thanks Jim yea my manual for adi powders ( ar makers) says 70.5 is top load for 7 mm. So it must be a little different. The chart in the back of book just said rl25 was the same
     
  7. RockZ

    RockZ Well-Known Member

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    ADI powders are Hodgdon powders.
    AR 2225 is marketed as Retumbo, I believe.
    Check out the data for Retumbo and see how it matches
     
  8. jimbires

    jimbires Well-Known Member

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    quick load says , 69.0 grains of Retumbo gives 2930FPS 104.5% case fill but a very low psi load . this load gives 47923 psi PMAX and the 7 WSM is rated at 64542 psi PMAX . Retumbo does look like it's close to the AR2225 velocity wise . Jim
     
  9. RockZ

    RockZ Well-Known Member

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    Yes,
    I am using Fed 215 primers
     
  10. jimbires

    jimbires Well-Known Member

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    Foreign , I think you need to be trying a faster powder . Jim
     
  11. RockZ

    RockZ Well-Known Member

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    I can recommend H1000.
     
  12. foreign

    foreign Well-Known Member

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    yea i think that will have to be the answer chaps. thanks. im going to fone some people and try get a few mag primers and some ar2217 (h1000)
    on a side not i tried some ar2225 in the .308 and .223. 165 in 308 44 grn 2225 1770fps .223 80vld 18grs 225 1290fps
    could be fun to work up sub loads.
    ps. i have a silencer for .223
     
  13. jimbires

    jimbires Well-Known Member

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    I don't have AR2217 listed either .

    H1000 shows a max load of 71.0 grains 109.3 % case fill ( 63965 psi PMAX) and the velocity is 3121 FPS . hope this helps . Jim
     
  14. foreign

    foreign Well-Known Member

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    Thanks Jim