firsttimer...listen to what Seattlesetters and ElkKampmaster say...they are right on the mark with their scope selections and are offering valuable advice. No need for anything bigger than a 40mm objective and these long heavy huge objective scopes especially on a scope smasher like a 338 anything in the 2x7-2x8 3x9 power range will work. The animal is bigger than a Honda Goldwing.