Favorite caliber barrel to shoot?
I have two Contender frames and shoot both on a regular basis.
My 10" in 7 TCU is my current main IHMSA gun and has my best sights (E A Brown
ScopeRib III). I like to shoot this one quite a bit with mouse fart loads (70 gr tumble lube cast / 2.4 gr TiteGroup) just to work on my ability to shoot acceptable groups while standing. Powder coated Lee 130s at 1900 fps using WC 844 are at the upper end of what can be called "fun" for shooting.
I have a 7.4" stub tube 32 ACP Rimmed barrel that I made from a piece of scrap 30-30 barrel. Just plain fun to shoot. With a tumble lube 55 gr cast bullet over of 1.7 gr TiteGroup and ignited by a reloaded primer, cost per round is $0.03 or so.
Not currently in my regular rotation, but deserving of mention is my external choke 357 mag hot shot barrel. It has sent lots of ammo down range and it is the least picky barrel I own. If I have a batch of 38s or 357s that did not work out well for some other gun, this one gets called on to put that ammo to use.
I had a 10" bull 357 max that shot great. Bad news was my wrist would hurt after a couple dozen IHMSA loads. The only barrel I have sold off to date. I am retired now, and do not need a gun that has the potential to cripple my right hand.
I also have an external choke 45 colt hot shot barrel. When I was young and foolish, I thought it was "fun" to shoot 250 gr bullets over a full charge of H110. It was like getting my palm slapped by a baseball bat. I ought to get rid of it, but would first need to shoot off some mid range ammo I have loaded. I never seem to get around to this task.