As a kid we wore out a Glenfield M60 22LR every year. 3 boys with lawn mowing or snow shoveling money 1000's of rounds almost every week. The rifles still shot good but they were jam-o-matics with like 50% FTF. KMart would take it back and give us a new one. That worked for 4 years of high school. Then off to the army.
So my first 1911 when I got out of the Army and could buy a pistol, I was too young to buy one, they would issue me one - go figure. Any way I have that barrel in my collection - it looks like a smooth bore, maybe a faint hint of rifling. I have no clue what the round count was but it was done mostly with cast bullets, lots and lots of them. I used a bicycle glove or my hand would bleed before I got to the second 500 rounds that day.