I have a friend who likes to shoot as fast as possible. he's been casting and reloading for about half dozen years. said he's pan lubing with Alox. and he was telling me he thought that cast 9mm boolits were melting in his Ruger SR9 barrel after going through 6 full magazines in rapid fashion. said barrel was very hot and accuracy fell way off and he shot a half dozen jacketed bullets through it while hot and it cleaned barrel right up. he's hundreds of miles away so I have not seen any of this but is all this possible?