The Aetecs, 44Mag, WTC, ATV, WTE and 22Mag scopes are extremely popular at RimfireCentral, there are very few, if any, that have anything bad to say about any of these scopes when used primarily on rimfire firearms, lots have them on centerfires too, but I can't vouch for their use on them, other than to say that I know of a couple that use the WTC on .300 win mags. I do know that Simmons has great customer service from those at RFC that have had problem scopes, they were replaced promptly with equal or better scopes in the case of discontinued models. I have 3 ATVs, a WTE and a WTC18, they all perform flawlessly, unfortunetly, they're all discontinued now and Simmons has moved their assembly plant from the Philippines where all the good scopes were coming from, to China, time will tell with their new Master series as to whether the move was positive or not. Good scopes can come out of China, but the QC Simmons/Meade puts into the new scopes is gonna be the deciding factor. I doubt all Simmons scopes will be hand inspected as are the Muellers.