Not that I' m recommeding this in any way {DON' T TRY THIS AT HOME}but some crazy friends of mine ,I' m not saying I wasn' t there but anyway my friends dad had a cheap muzzleloader with a solid stuck breech plug that always gave him trouble so they decided to experiment a little.they built a holder which the gun could be fired from a safe distance, DID I MENTION DON" T TRY THIS EVER! The safe distance I' m talking about was 400 feet or so.they fired the gun using a 245 gr hornady and imr 3031 smokeless powder with the same load my friend uses for his 308.We fired the gun using a remote controlled pair of pliers my friend built and we thought the gun would be in pieces when we got there, and guess what no damage at all.We even put a bullet on target sort of.So we loaded the gun with a little heavier of a load and a 300 gr bullet and fired again still no visible damage.Needless to say we stopped there.