Well, considering the fact that the book that came with your Glock specifically tells you NOT to use cast bullets, I'd say you need to change to an aftermarket barrel.
dullh said:Glock cautions against cast bullets in factory barrels because there's a good chance you can blow up the gun...simple enough for you?
In case you didn't notice there's a difference between reloads and cast bullets. Every manufacturer cautions against reloads for liability reasons - reloading done right is harmless; Glock cautions against cast bullets in factory barrels because there's a good chance you can blow up the gun...simple enough for you?
Do what you want...it's your gun, hands and face, not mine.
Because, independent of pressure, and related solely to the presence of lead, Glock barrels instinctively know to disintegrate when contacted by cast bullets, despite the fact that polygonal rifling provides less nooks and crannies for lead to build up in than traditionally rifled barrels, and that careful load data has been observed... but only Glocks know to do this.
I've put thousands of cast bullets through a handful of Glocks, with nothing more exciting to report than accuracy and inexpensive ammunition. My favorite 40S&W mold is the Lee #TL401-175-SWC 175g LSWC mold. Fed very well in a Glock 22 and 23. Just don't walk under any ladders or open umbrellas indoors.