My LGS sales person said it is just a matter of time before the scope [any] needs factory work because I shoot a 300 win mag . I am slowly turning my old browning A bolt away from hunting and start banging a gong at 300 yards . It has a pentax 3x9 now that has survived godzilla killer heavy loads [500 maybe ] and my plan is to put 200/300 a year on the range only . I am looking to up scope but the crazy number /types of models is very confusing to an old fudd ....the more i research the more " you better watch out for......" warnings i get .