Bought a Glock 20 Gen 4 SF, Looked hard and could find no ammo here in AK. Found 1 box of Buffalo Bore 230 Gr cast in Seward AK, had to reload some 180 gr HP. Like the Glock its my first after many 1911 style 45,s.
Was able to buy 4 boxes of 10 MM 180 gr Rem MC FP in Oregon brought them home on the plane. Reasonably accurate and functions fine.
Shot 5 rounds of the expensive BB 230 gr. after cleaning barrel, with a 22# spring. Function was great and hit a rock at 50 yards. No case smile marks, but will not reload those cases.
From what I read the BB cast ammo was tested in a stock Glock barrel, and they recommended the 22# spring and steel guide rod and removing any lead before shooting jacketed bullets.
