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I tried W231, it shot well. I loaded 4.1 grs, chronographed that. Decided that I could bump it up a 0.1 grain, and loaded some more.
It is a good powder. Been using Bullseye, that too is a good powder.
9 MM Parabellum
M92 FS Beretta Bar Sto Barrel
125 LRN .356" 3.5 grs Bullseye S&W cases WSP OAL 1.110"
27-Mar-06 T = 58 °F
accurate, high percentage failure to feed
Ave Vel = 986.5
Std Dev = 9.21
ES 25.78
High 992.9
Low 972.9
N = 14
125 LRN .356" 4.0 grs Bullseye S&W cases WSP OAL 1.110"
27-Mar-06 T = 58 °F
accurate, consistant function
Ave Vel = 1114
Std Dev =20.63
ES7 9.03
High 1167
Low 1088
N = 32
125 LRN .356" 4.1grs W231 Lot 8UB9 Mixed cases WSP OAL 1.10"
20-Jun-09 T = 90 °F
Ave Vel = 1033
Std Dev = 11.53
ES = 44.11
High = 1066
Low = 1022
N = 12
125 gr FMJ Olympic Factory 27-Mar-06 T = 61 °F
Ave Vel = 1261
Std Dev =20?
ES 63.11
High 1288
Low 1225
N = 10
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