I have one in .450 Marlin that I am looking to turn into a cast shooter. I have not measured a fired case yet, but will. A .458 Lee 405 rnfp slips into the case, so I'm thinking about .460.
I was perusing the Accurate catalog and noticed the 46-300T with a reduced front driving band for the 1895.
It looks like a good one. I also liked the 46-350V. It looks like it has a nice wide meplat for laying a serious smack down on anything that moves.
I get that every firearm is different, but what has been your favorite cast boolit in the guide gun either .450 or 45-70?