KBs in Glocks
Your chances of a KB in either a 21 or a 30 are so slim, you are more likely to be struck by Haleys Comet. All of the real ones I've heard about are from careless re-loaders of 40 cal. usually with lead bullets, a NO NO , with Glocks Polygonal rifling. As you know any 40 has way more pressure than the 45 acp. or 9mm. Add to this lead bullets and it's not good. You just have to pay attention to Glock's warning about this and shoot factory loads and forget the lead ,cause the rifling doesn't like it.