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confused with velocities very confused

 
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  #1  
Old 09-04-2010, 12:53 AM
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Location: christchurch, nz
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confused with velocities very confused

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...
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  #2  
Old 09-04-2010, 11:35 AM
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Join Date: Dec 2001
Location: Potters Hill, NC
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Re: confused with velocities very confused

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.
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  #3  
Old 09-04-2010, 01:07 PM
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Re: confused with velocities very confused

In the 7WSM with 162 Amax my accuracy load is 3030fps with a 26" barrel using H1000.
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  #4  
Old 09-04-2010, 01:56 PM
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Location: christchurch, nz
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Re: confused with velocities very confused

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
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  #5  
Old 09-04-2010, 02:08 PM
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Location: clearfield county , Pa
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Re: confused with velocities very confused

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
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  #6  
Old 09-04-2010, 02:17 PM
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Re: confused with velocities very confused

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
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  #7  
Old 09-04-2010, 02:27 PM
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Re: confused with velocities very confused

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