Anyone with any experience with Barry's plated bullets used in a Glock 19 with standard polygonal rifling?
I got my answer from Berry's.
FAQ: Can I shoot your plated bullets in my Glock?
Yes. We have a large contingent of loyal Glock shooters using our bullets. The plating is thick enough that you will not get lead fouling in your bore, which is the nemesis of polygonal barrels.