I'm looking at an H&R huntsman in 45 cal, the bore looks pretty good but I'm just concerned about the breech plung being stuck. It has two small holes on the side of the nipple, I'm assuming there a tool to remove it, but I guess a fellow could make one if need be. I also assume this would be a PRB only because of slow twist. If I removed the breech plug is there any option to convert to 209?