i have no experience with mueller but if you can get a scope that size for that price your gettin a **** of deal or a peice of junk scope you can get a bushnell with not as much variable but is better scope if 260 is your limit on funds and u want a big scope like that go to bushnell for 300 bucks u can get a 4-12 leupold vx1 there a great scope also go to the store and look through the differnt ones and you can tell the difference in cheapies or gooduns try www.riflescopes.com