I've had people tell me they run reloads or lead bullets out of stock glock barrels, but I've also read a fair about hazards associated with it, so when i got my .40 i spent 99$ on a lone wolf aftermarket barrel, and thats what all my reloads and lead bullets are shot out of.. seen a number of pictures of case failure/ ruptured casings, never seen it happen firsthand. I do think from looking at the older generation glock barrels compared to newer ones that the newer chambers are more supported than the originals..