I used a 7mag as a donor on mine, the problem child was a factory RUM to start with. No centering problems, just the cratering indicator. I considered the .062 pin and bushing,but believe I'll let it be. Lotta work considering the crappy brass life in this caliber. owner doesn't think its a big deal now that he's aware of the cause. Would rather put the $ into a brake.

Thanks

NRA Benefactor