I'm really tired, so bear with me.
I've been loading West Coast 230 gr RN in mixed brass, OAL 1.254, crimped to .471, using an RCBS carbide die set, seat/crimp simultaneously. No significant setback when repeatedly chambered from slide lock in my Kimber. Loaded and shot about 1500 rounds.
Tried a 185 gr FP tonight (230 RN were out of stock), started with the listed OAL of 1.275, and almost 0.030 setback from one chambering. I seated deeper and crimped tighter, but more setback.
I went back to my trusty 230 gr RN loads, and they were setting back, too. After much fiddling around (seating depth, crimp, different bullets, brass, etc...) it seems that rounds chambered from a full magazine would set way back, but rounds chambered from an empty magazine would only shorten by a couple thousandths. No adjustments I made would prevent it.
The gun is a customized Compact, but the barrel/throat/ramp areas are stock, as is the recoil spring. Mags are Wilson 7 round.
I pulled the Dillon powder funnel, and it measures 0.448 across the expander section.
I'm going to bed now, but any comments would be welcome.
I've been loading West Coast 230 gr RN in mixed brass, OAL 1.254, crimped to .471, using an RCBS carbide die set, seat/crimp simultaneously. No significant setback when repeatedly chambered from slide lock in my Kimber. Loaded and shot about 1500 rounds.
Tried a 185 gr FP tonight (230 RN were out of stock), started with the listed OAL of 1.275, and almost 0.030 setback from one chambering. I seated deeper and crimped tighter, but more setback.
I went back to my trusty 230 gr RN loads, and they were setting back, too. After much fiddling around (seating depth, crimp, different bullets, brass, etc...) it seems that rounds chambered from a full magazine would set way back, but rounds chambered from an empty magazine would only shorten by a couple thousandths. No adjustments I made would prevent it.
The gun is a customized Compact, but the barrel/throat/ramp areas are stock, as is the recoil spring. Mags are Wilson 7 round.
I pulled the Dillon powder funnel, and it measures 0.448 across the expander section.
I'm going to bed now, but any comments would be welcome.