a short bbl 10mm becomes essentially a .40 S&W
I realize it sounds like interchangeable barrels are my mantra in this thread... and I don't even own one. But this is an argument for putting the longer bbl in a G29. Gives a guy the option of concealing a G29 in town, and yet still being able to carry the gun afield with wildlife loads and the longer bbl that does not compromise bullet velocity. He'd simply need to drop the longer bbl in the gun, cycle it a couple times to verify function - then load up and go.