To be honest I am struggling a bit with this powder. It is fun so it's not a bad thing. I'm testing with a 53 gr Hornady V Max bullet, hornady brass, WSR primer.24.5 gr gave me a .364" shot group at 100 yards but as I continue to increase the powder charges, the groups are stringing vertically on me? I am leaving 5 minutes time frame between shots do it is not a barrel heating issue. I feel I need to increase the powder because it's leaving a carbon ring on the necks at 24.5 gr. The ring is slowly disappearing but the groups are stringing. I re tested the 24.5 gr with lengthening the oal out another .020 "and it shot a .379" group. Would you keep working up or work on the OAL ??? I'm thinking of decreasing the OAL or increasing the bullet weight to 55 gr bullet and see if the change can expand the neck a bit more. Yes, I'm lost. Lol.