i have the same gun, and probbaly the same kind of eyes (beginnings of cataracs, astigmatisim, typical 50 + year old focus problems)! i put a 4-12 simmons on mine. a 3-9 would have been fine, but i found a deal, you know how that goes. i mounted it low, because, to me, the open sights are useless. i leave it in 4 power, except for longer distance or if i have time, i use it to make certain of the animal and whether or not it has horns. i.m.o. for us with not so good eyes, anything less tha 3 power is like looking through a straight peice of glass. so, to all you youngsters with good eyes, ENJOY THEM WHILE YOU GOT 'EM! for the rest of us, buy scopes with more power!