Same findings here. Precision Delta and Montana Gold 124 gr. FMJs are now loaded to 1.100 oal for my gen 5s. I’m curious if that small amount of extra rifling increases accuracy, if so why not make the barrel .100” longer. No need to answer that. Oh, my LGS is having the Glock rep out for a sale day and I may question him just for the heck of it.