Favorite caliber is the old 45-70 Springfield. Have several Trapdoors. Maybe they will be antiques and not stolen by the Gore Gestapo.
Had to have a special bullet mold made since the barrels were .462 or so; not the "Standard" .458. They all go into 2-3 inches at 100 meters with the right load.
Got a Ruger #1 and had it rebarreled with a BIG tube.That rifle was originally about 6.5 pounds and would kick the poop out of you. (Now don't someone say I needed it kicked). A lot more pleasant to shoot now.