I rebarreled mine with less than 70 rds. I just wanted a custom barrel. Have it borescoped and that will tell you alot. I think I will get at least 700 rds. i don't shoot it hot. And I have lots of other guns to shoot. It is one of my favorites.I've been told RUM's are hard on barrel's. Whose barrel did you go back with? About how long did yours last. I bought my rifle used and have no idea the number of rounds run through it or the frequency it was shot. Remington Sendero with 26" fluted barrel.