in a 4 year span. Ball ammo dupes, with cast lrn 230 gr bullets, assembled on his Dillon 1050. He had the Colts rebarreled and the slide tightened at the 50,000 rd mark, both were still doing fine, 1/4 million rds later. He wanted match grade accuracy out of them, ya see. Full charge .45 ammo is a LOT harder on a gun than is 9mm ball. SEE if any .45 Glocks come CLOSE to the durability record of the 9mm glocks. The same bolt wt and springs that a .45 smg beat to CRAP in one magful of firing, worked fine for many hundreds of rds. I had to pretty much sell each one as I built it, to get expense money, so I never got to shoot them more.