Okay....I'm finally getting ready to shoot my .50cal CVA Kentucky pistol...but wanted to clean everything up really good beforehand...grease the threads...etc. I purchased this gun used (it hase never been fired though)...so I don't have the manual. I was gonna try and pull the drum....but that baby won't budge....then I got to thinking...before I take a sledgehammer to it...maybe it's not supposed to. Can you remove these drums? Are you even supposed to for cleaning...etc. I always remove the drums to clean on my others...and hate the idea of not being able to...Thanks for your help.