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Old April 13, 2001, 07:34 PM   #3
Clark
Senior Member
 
Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
7.62x54R S&B Factory ammo 2" 3 shot groups at 100 yards

1) Lyman's 45th [1970] and 47th [1992] both say 45 gr IMR4895 max for 180 gr JSP 3.037" 2493 fps
2) PO Ackley 1966 says 49 gr IMR4895 180 gr for 2675 fps
3) Hornady 1973 says 47 gr IMR4895 180 gr 2600 fps
4) Sierra 1st [~1970] and 50th [1998] both say 45.1 gr IMR4895 for 180 gr 2500 fps
5) Modern Reloading by Richard Lee says 38.7 gr max for IMR4895 and 180gr 2354 fps
6) I found 44.3 gr the most accurate as shown in the data below

Reloaded with neck sized cases and loaded with 180 gr Rem .312 bullets,
CCI 200, 2.843" OAL, and IMR4895 powder shooting 3 shot groups: 40 gr
2.7" 41 gr
2" 42 gr 2.25" 43 gr >4" 44 gr 1.2" 45 gr 2.9" 46 gr 1.4" 47 gr >4" 48
gr 2.5" 49 gr 3.3" 50 gr 2.5" w/ sticky bolt

I reloaded again: 43.0 gr > 2" 43.3 gr 2.4" 43.6 gr 3.5" 44.0 gr 2.1"
44.3 gr 1.2" 44.6 gr 2.2" 45.0 gr 1.7" 45.3 gr 1.7" 45.6 gr 4.5" 46.0 gr
2" 46.3 gr 2.6" 46.6 gr
4.6" 47.0 gr 3.2" 47.3 gr 1.3" 47.6 gr 3.8" 48.0 gr 2.2" 48.3 gr 2.7"
48.6 gr 3"
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