I bought my Parker Hale mod for my 22rf back n 1982, it finally gave up last year. This is after many thousands of rounds. I cleaned it, so no shame to it at all. I have an Ase utra on my 243, 14 years old and going strong. I give it a little squirt of oil after use, it’ll last a while yet. T8’s and Stalons are other mods I’ve used at work. Stalon was pathetic, less than 300 rounds before it developed holes. The T8’s last but you have to look after them, a wee squirt of oil inside and loads of oil on the outside.