Anyone out there have advise about this project; I am building a 22WMR. I bought a barrel from a Marlin Model 60 22lr and reamed it to accept a 22WMR. So I also bought a piece of schedule 80 pipe with 3/4" id. I reamed it out so it was more true to round and I turned the barrel taper just a bit to make it straight at the chamber end. At this time the barrel is just a bit too tight to fit in the pipe. My plan is to heat the pipe and drive the barrel in for a good fit, then pin it. the original plan was to weld a pivot lug onto the pipe before attaching it to the barrel to make a break open action. Which I still may do. But looking at the parts as they are it seems a shame to not use the pipe extension as a part of the receiver. So, now I am thinking about making a trap door action out of it. That would seem to me to be the simplest way to go here. I also purchased a trigger/hammer assembly from an old Noble model 80 shotgun. I think I could incorporate that into the design. This is not going to be for match shooting. I just want something to test reloading 22WMR with. I know it will be crude. I hope none of the fine gunsmiths here will take exception to my neanderthal approach to this. Any advise?.....Don't worry I am strapped in.