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7mm reload problems (ballistics)

 
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  #22  
Old 06-16-2010, 10:57 PM
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Join Date: Sep 2009
Location: La Plata NM
Posts: 357
Re: 7mm reload problems (ballistics)

Just looked up a few recipes.

Alliant website:
65 grs. 2976 fps. CCI250 24" barrel

LoadData.com (Handloader Magazine):
65 grs. 3017 fps. fed 215 no barrel length given
65 grs. 3075 fps. rem 9.5 26" barrel 58,600 psi
62.9 grs. 3000 fps. (162 grain bullet) WLRM 24" barrel
65 grs. 2971 fps. WLR 24" barrel

My Personal Load from 10 years ago with a 160 Partition Gold:
66 grs. 3090 fps. fed 215M 26" barrel Oehler chrono

From what I can see they all seem to be close. Primers can make a big difference but not 400 fps. You might want to try a different lot of powder and shoot it again. My 7mm-08 Ackley is faster than your Mag with the same bullet weight and that should not be the case. You might also call a tech at Alliant and tell them your problem and have them check your lot number. Every so often they have recalls on certain lots and yours may have slipped through the cracks. Good Luck!!
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  #23  
Old 06-24-2010, 05:14 PM
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Join Date: Jan 2010
Posts: 99
Re: 7mm reload problems (ballistics)

I'm running 65gr of R22 with 162gr Interlocks, CCI 250 primer, and Winchester or R-P brass. We've shot these from Parker Hale 1200 Super bolt and a BAR. Not pressure issues in either.
Between the 7mm Mag, 270 Win, and 270 WSM my Nosler book and chrony are far apart. But the .223 loads have been pretty close, as well as 45 ACP. I am not sure if their data is way off or there is much play in the magnums. I know the 7mm Mag data has been the same for past 3 editions for R22.
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  #24  
Old 06-24-2010, 09:55 PM
Gold Member
 
Join Date: Jul 2009
Location: Idaho
Posts: 580
Re: 7mm reload problems (ballistics)

thanks for all the info
sorry it took so long for me to reply ive been in yellowstone
what a great place
i am hoping to work up to 63 gr this week end
retiredcpo
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