I am using a Ultra-dot on one of my 460 Mags and a Bushnell 2X6X32 scope on another 460 Mag. I don't have a problem with scope moving. When I had my T/C Encore 460 Mag barrel I was using a Bushnell 2X6X32 scope on it. In my opinion a scope is the best way to get the full potential of the 460 Mag. Now if you don't plan to do any real long range shooting with the 460 barrel, get an Ultra-dot Match-dot red-dot sight. I have had one on a 500 Mag for some time now and with over 2000 rounds, I have not had the red-dot move in the rings. I use Warne rings. As far as my loads, I use Hodgdon's load data for the 240, 260 and 300 gr. bullets.