Have CVA brand 12 ga muzzle loading doublegon...

One barrel is stamped 700 kp/cm2...

No proof stamps nor max load stamps...

700kp translates to damn near 10,000 psi...

would like to suggest max load to potential new owner...

Google suggests 85 grains Black, with 1 1/4 shot as max load..,

your suggestions?

this is two barrel set, with 50 cal rifled barrels included...

Last edited by ed good; 07/13/26 03:36 PM.

keep it simple and keep it safe...