The only reason I posted that video is because you can visually see the deflection happen (which is pretty ridiculous). Usually, any time you buy a scope, you have to consider what to do to mount it. OK, so you have rings and bases. But many do not and then choose aluminum parts to hold their $350, $700 or $1800 scope onto whatever rifle it is getting put on.
If you have not done so already in your research, go to Natchez http://www.natchezss.com/optics.cfm?...=9&category=20
Their "drill down" menu is one of the best. It beats opticsplanet hands down for a search function. Of course they do not carry everything that opticsplanet does. I have bought several scopes from them at pretty major discounts. You can search by optical power range, objective size, reticle, manufacturer etc.
Have you considered the Vortex Viper 4-12x40PA ? It has side focus to correct parallax and is $399 and Vortex has one of the best warranties in the business.
Vortex Viper 4-12x40 PA Matte Riflescopes FREE S&H VPR-M-04BDC. Vortex Viper Rifle Scopes, Vortex Rifle Scopes.
It has a dead hold reticle and a 1" tube, so if your current rings are good you should be all set.