At 60 and shooting Win 52's both target and sporters for paper and tree rats,I feel good at 4-5000 rounds, Wolf MT, S&K match and good lots of Federal auto match. I also put in a couple 1000 rounds of the S&K magazine in the 500 ct cardboard tubes.. I cannot tell any change from the Wolf, same headstamp ,sound and accuracy. I did have sticker shock on last 2000 rounds. Very Best WinPoor