The .357 Sig is looking interesting. The videos shown are interesting too! Wish there was a gellatin block out there a fellow could afford that was reusable at the range. It'd be fun to run some tests yourself. For now I'm restricted to water jugs. Maybe not realistic, but it's repeatable & comparable with different ammo.
One of the really nice things about a Glock is you can get say a .40 & through aftermarked bbls, have a .40, .357 Sig., & a 9mm!