I have 6 of em, all on centerfires, an Eradicator on a 204 Ruger, 4-16x Sportdot on a .243, a 2-7x Multishot first on a 30-30 then an 835 Ultimag, and 2 TacIIs, one on a 280 Improved and another on a .270 Winchester, all are great scopes, highly recommended! They use to be an exceptional buy, but a price increase last year took some of the exceptional out of the bargain, but they're still well worth the money. Mueller CS is also top notch, anyone that's dealt with Rich knows that and will vouch for him and his company.
Best price on the net is at Missou Mule which has free shipping and great prices.
Tim
http://www.mizzoumuleguns.com/