Trying to replicate IMI M855

Pawpaw40

Member
Jan 5, 2009
154
18
East Texas
My bull barreled AR-15 likes IMI M855 rounds. I chronographed some and they are averaging 3075 fps out of a 1 in 8", 22" bull barrel. I can't find any load data that will push a 62 grain bullet that fast. The most accurate with Varget was 22.7 grains, 24 was listed as max load. 22.7 gave me about 2700 fps, and comparable groups. I would really like the extra 375 fps with the .5 inch groups. Besides Varget, I have BLC-2 and Benchmark powders. Any ideas?
 

Koinonia

Well-Known
Sep 10, 2012
1,208
38
San Antonio
There is not a listing for 62grn in the 9th edition Hornady, however it lists a 68 Grn going 3000fps with 26.3g of BL-C(2). Im sure with some fine tuning (and starting way lower working up with bl-c(2)), you could push a 62 grn projectile at that speed.

Lists 60 grn projectile going 3100fps with 27.4g of BL-C(2).
 
Last edited:

Stumpnav

Member
Mar 2, 2013
87
16
You might try Ramshot TAC...their guide list a 62 gr at 3078 fps.

here is their online guide: http://www.ramshot.com/wp-content/uploads/2010/09/ramshot_handgun_rifle.pdf
 
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