Originally Posted by c3shooter
Two problems- do not know of anyone that make barrels for a Glock except, well, Glock. Second problem- Glock rifling is polygonal, and not for lead bullets. Danger, messy, harmful, blood, first aid, bad ju-ju.
KKM, Bar-Sto, Lone Wolf, Storm Lake, EFK, Briley,Wilson Combat, and
probably a few more ALL make barrels for Glocks. AFAIK they all use
conventional rifling and are fine with lead bullets.
That said--an unchambered barrel is going to be .355/.356 bore diameter. The only possible caliber I can think of that might be "milder" than 9x19 and fit the bore diameter is .380. W-A-Y more trouble than it could possibly be worth. Extraction issues, magazine issues, functioning issues--
Put an aftermarket barrel in the 17 so you can shoot lead. ISMI 13 lb
recoil spring, and download 9x19. If you don't want to get into reloading,
the Remington-UMC 115 FMJ factory load is about as mild as it gets. It
won't make USPSA minor power factor from my guns.