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I just made it out to the range and chrono'ed a couple of loads with AA
2220,2230,2230-C powder. I used two rifles, one a 20" 1x9 chrome lined bushmaster
w/ A2 bird cage, the other a 16 1x9 chrome moly steel( not chrome or SS) J&T post
ban upper. I also shot some Am eagle factory ammo.
____________________________20"______ 16"
55 fmj AM eagle___________3180______3026
50 HP AM eagle___________3200______3091
26g AA2230 55fmj__________3242______3250
22.0g AA2220 55fmj________2883______2815
22.4g AA2220 55fmj________2885______2822
22.8b AA2220 55fmj________2955______2900
25.0g AA2230-C 60 V-MAX___2956______2891
25.7g AA2230-C 55fmj______3038______3008
26.4g AA2230-C 55fmj______3094______3055
26.4g AA2230-C 55 NOS BT__3054______3023
26.4g AA2230-C 55 WIN PSP_3075______3052
All the above using once fired FED brass, OAL 2.245 except 55 PSP 2.235. Below is
data using once fired LC 91 brass
22.8g AA2220______________2925______2876
The AA2230 load with 26g with 55 fmj was to hot for the carbine, flowed primers,
brass looked ok out of the bushmaster but I'm going to back it off a bit ( to 3150 fps
) I've used the 26g load for years but this is a new keg of powder and the velocity is
higher, and you know what they say, change any componet and back off and retest.
These are an av. of 5 shots at 20 ft. The AA2220 had a lot of flash out of the 16"
rifle. I'm going to try a little higher load of 2220 in the future. WIN small rifle primers
were used throughout and all loads were given a slight crimp with a lee factory crimp
die. I'll test group size at a later date with scopes on the rifles.
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