I ran 10 of the above load over the chronograph, but haven't been back to the range with the bag to better check accuracy.
Load recap: RMR 180gr FMJ-FN, 8.5gr BE-86, Starline brass, CCI 300 LPP, OAL 1.250-1.255".
Shots were take 15' from unit in 45F temperature, with a stock G20.
1218, 1207, 1227, 1223, 1215, 1225, 1218, 1213, 1221, 1221.
High: 1227
Low: 1207
Average: 1218
ES: 20
SD: 5
Not the load for highest velocities, and honestly I was a little disappointed. But the consistency is nice. 8.5gr is max by Alliant data. I'm not sure if it's worth going beyond it. I was hoping for 1250fps from that 4.6" barrel, but I have a KKM 5" inbound so I might see how much that changes things, if at all.