I had a 3-9x40 gameseeker on a mossberg atr 270. I dont like the BDC they have,mostly just because it is just kinda distracting my view. The eye relief is lacking. I had it on a 7mm mag, cut my eye open, then stuck it on this 270. It is just about right. My sister came back from iraq and wanted her own rifle for hunting, gave this to her and it fits her like a glove. She says it kicks more than her M-16 but its more accurate. I have no idea, I am not an m-16 guy. Anyway, she likes the scope. EJ