Thompson Contender pistol chambered in 45-70. Shot it once. Never again.
I just sold the .45-70 barrel for my Contender carbine recently. I wasn't using it and needed the $$$ for other stuff, but it was fun to shoot. It was actually easier to shoot that little beast as a pistol than a carbine. If you knew what was coming the recoil was manageable. If you weren't expecting it, it was like a miniature version of this:
I'll see you a 10.8 ounce 38 and raise you one 11.4 ounce 357 mag, the 360 PD.