Hey,

DO NOT try to force the rounds out!!! Knock them out with a cleaning rod until you get the load right. The cam on the fore-end will be stressed and where the pin is will become oval. I did that, %^&#@!!

I shoot a reduced load in my .375 H&H rimmed double.

77 grains of H414 for a 270 grain bullet. You could start with 70 grains and go from there.