And how well do you think those PRBs will work in a 50cal 1-28 twist for a elk load. Not to mention its now illegal to use a 50cal PRB for elk in Colorado. 54cal is now minimum for elk if using PRB.
https://cpw.state.co.us/Documents/RulesRegs/Brochure/BigGame/biggame.pdfTo hunt elk or moose, conical bullets must be a minimum of .50 caliber, and round-ball bullets must be a minimum of .54 caliber.