Originally Posted by allmons
Glock barrels were originally designed for combat rounds ( full metal jacket ) and the barrels do NOT handle lead bullets well at all. In fact, some guns have been destroyed trying to fire lead bullets.
Why in the world you would want to is beyond me, but if you MUST shoot unjacketed lead, please buy a non Glock barrel designed to handle it.
Yup, do yourself a favor. Buy an after market barrel, shoot lead bullets and be happy, I did.
It also shoots jacketed bullets better than the Glock barrel.