I am in the process of moving into the precision rifle world. It is my intent to eventually shoot out past 1000 yards, though I have some work to do first. I inherited a very nice Leupold Vx III 6-20 x 50 scope. It is a nice scope, and was previously used on a Savage 220 swift for bench rest shooting at 100 yards. It has only a duplex reticle though, and no numbers on the adjustment knobs. I am concerned about several things. I am not sure that this scope will hold up to being shot behind .308 with a muzzle break. Also, I'm concerned about being able to accurately adjust it without any markings. I was considering purchasing a Steiner Tx5i 5-25x56 scope. I am interested in some opinions as I don't want to ruin a scope, to be frustrated attempting to adjust the scope, or spend a bunch of money I don't have to. I do want the right equipment for the job.