My 22-250 Ackley came to me as a used gun a guy was walking around a gun show about 35 years ago. It came in a package deal with a 30-06 Ackley & 2 sets of dies. Neither shot well on the 1st outing, but they do now. They're both still in the safe & I'm happy with the use that I got from them.
Unknown # of rounds on a sloppily rechambered factory Rem. 700V barrel. It came with some cryptic records & I'm guessing about 700 rounds after the rechamber but have no way of knowing for sure. Since I've owned it there has been a minimum of 1500 rnds, more likely about 17-1800. So a minimum of 2400 rnds as an Ackley is a fair guess. Most of these were at the bench but it whacked a few groundhogs at distance over the years. Loaded for max velocity with accuracy, but no rapid fire & cleaned after a day at the range, it's surprising it still shoots as well as it does.
Both rifles were damned projects when I got them. It took a week of scrubbing with Sweets to get the copper out of the barrels, but the 22-250 was shooting 4 or 5 shot groups between 1/4-3/8" regularly @ 100 yds. after all the stupid stuff got fixed. The 50gr Hornady SX or Sierra's 50 Blitz @ 3900+fps worked wonderfully until I couldn't reach the rifling anymore, so a 53 Hornady match was substituted. They dont touch anymore either. It shoots around 1/2-3/4" on a good day these days. The barrel is done. It will be rebarreled one of these days as another 22-250 Ackley. Maybe a 26" 12-twist this time. That 53gr V-max looks interesting at Mach IV.