I do a lot of stalking hunts with my 527 in 7.62x39, it's my primary feral hog and pest animal rifle. The iron sights are very good, but as I've gotten older, I don't pick them up as well as I used to. I've gone to a fixed 4x Weaver Classic scope. Keep your shots under 150 yards, ideally under 120 and you'll get very good results. The load I hunt with is more or less a duplicate of the Hornady SST loading, 123gr SST at 2340fps, effective on a deer or hog out to 150 yards. Too much energy loss much past that range for a certain clean kill.