Country Boy, There is a variety of "master series" Simmons scopes. Blazer, 8 Point, Prosport, Prodiamond, Prohunter, Aetec. Blazer being the lowest Simmons quality and Prohunter or Aetec being their highest quality. Suggest you consider only the ProHunter versions....have a few of them on mid to light recoiling centerfire rifles and they've been more than adequate for my range target shooting. Decent glass and I've had no problems with mine....matter of fact, the two 257 Roberts rifles I put about 40 rounds with downrange today, one had a 6-18x40 side focus Prohunter and other a 6-21x44 side focus. Be aware that many of the Master Series scopes made under Meade ownership are now discontinued by Bushnell.....good bargains on them pricewise.....but may be a problem on many models for warranty replacement/repair since change of ownership.