When the 10mm Auto came out about 20 years ago it was brutal...my first experience with it was in a Colt Delta Elite. That gun was super-accurate, but amazingly violent. Today, most factory loads are quiet a bit tamer (not much hotter than .40 S&W loads) though Winchester's 175 grain STHP and Cor-Bon's loads are close to what they once were (originally they were designed around a 200 grain HP at 1400 ft/s).

The 10mm would get the job done...no question in my mind...and I love the Glock 20 with this round...I have not tried the G29 but figure that firing it with full power rounds would be an experience I would prefer to avoid.