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.223 Remington 5.56
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 Posted: Sun Sep 21st, 2008 01:19 PM
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Force_Recon_Marine
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27 grains AA2460 Fed 205 primers 55 grain bullets

27.5 grains Varget Fed 205 primers 55 grain bullets

29 grains Varget Fed 205 primers 40 grain bullets

These are max loads so reduce accordingly and work up slowly.



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Swift Silent Deadly


 Posted: Tue Oct 14th, 2008 04:46 PM
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Oberg
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Gun: S&W M&P 15 with 16" Barrel

Powder: Ramshot X-Terminater 27.5 gr

Primer: CCI or Winchester (didn't seem to make a difference)

Case: R-P and Winchester Full Length resized

Bullet: 40 Gr V-Max from Hornady with O.A.L of 2.25 (just short of mag length)



 Posted: Sun Nov 2nd, 2008 06:21 PM
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alkay
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Do you have any load data for .556 with 62 grain bullets?



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 Posted: Mon Nov 10th, 2008 10:20 AM
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GaCop
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A load that works extremely well in both bolt and semi-auto is 20.6 grains of IMR 4198 in RP brass, CCI BR-4 primers, Sierra 52 grain Match seated to 2.250".

 

Last edited on Mon Nov 10th, 2008 10:20 AM by GaCop



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Tom


 Posted: Tue Nov 11th, 2008 12:33 AM
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alkay
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Thanks for that data, now I need to know if my 1:9 twist is okay for 52 gr. bullets.  Also, what kind of velocity can I expect to get from a 16" AR-15?  Thanks again!



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 Posted: Tue Nov 11th, 2008 09:44 AM
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GaCop
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Over my chronograph I get 2200 fps in an 11" barrel carbine.  Out of a Savage Model 10 with 26" barrel velocity was closer to 2800. YMMV

 

Another load that shot well in my M4gery, 1/9 twist-14.5", is loaded with 25 grains of Varget, a Sierra Match 68 grain BTHP lit by BR-4 primers in the RP case and seated to 2.260" (max length that will fit in a mag).  The starting load for Varget is 23 or 24 grains (don't have access to my manual right now).

 

The latest Sierra manual has some good loads listed but, IIRC they obtained velocity in a 20" AR.

Last edited on Tue Nov 11th, 2008 09:51 AM by GaCop



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Tom


 Posted: Wed Nov 12th, 2008 12:02 AM
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alkay
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Thanks again, I appreciate that.



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