My next attempt will be using the 6 VDC charger setting. Will also cut the time in half too 20 minutes. Going to make overflow setup for muzzle end too drain into a seperate container. I just used a rubber stopper to plug the chamber end. Pro Shot 17 caliber SS cleaning rod with several rubber insulation sleeves for solderless terminals worked great in a 30 caliber barrel. Will be interesting when smaller bores are encountered probably will end up using heat shrink tubing instead.