According to your numbers, you're getting about 304 ft. lbs. of energy at the muzzle. Definitely not something that I want to get hit with.
You failed to mention "how much" Shuetzen you used, I'm curious.
I've chronographed a few 45 Colt loads and have more to do but here's some numbers.
40gr 3f Swiss, 235 RNFP with a .060 veggie wad over powder. Fired out of a S.A.A. Clone with a 12" barrel.
1,065 fps with a muzzle energy of 592 ft. lb.
35gr 3f Swiss, 140gr Round Ball, cornmeal filler & .060 veggie wad, same gun.
1,143 fps with a muzzle enerty of 406 ft. lb.
I've basically cut back to "Gallery Loads" now with only 20gr of 3f Swiss and a 150gr conical bullet. These make great plinking loads as they don't eat so much powder but I haven't chronographed them yet, maybe this weekend.
Bottom line is though, if you're looking for a self defense round my suggestion is a 12 gauge with a pistol grip. Barring that, I'd probably find some
Glazer Safety Slugs in 45 Colt. It's your life on the line if you use that gun for defense, historical accuracy ceases to be important the moment the guns clears leather.