I have 2 Rollers in 8x58R, that are both great shooters out to 200 yds, as far as I can shoot accurately with the express type flip up rear sight. This is one of my favorite rounds, with the 245 gr GC Lee bullet. I am using a good dose of IMr 4198, with great results, I dont know why one of these rifles would not do well out to 5-600 yds with ease. I may have to get a decent sight and see how one does, drill and tap it myself. Any thoughts??