I have a Ruger 77/44magnum ss with a integral suppressor which is a 1 3/4" alloy concentric tube thats runs back to within 3/4" of the action. I want to fit a IOR 2.5-10x42 to it but I really need a sloped mount as a subsonic 300gn cast bullet has a pretty round trajectory. Has anyone got any suggestions such as: Drill and tap the action (or is it too hard to drill and tap?) and fit a sloped mil std 1913 base. Fit some giant Burris signature rings and install the eccentric inserts? I don't think they will be anywhere high enough though. Fit burris weaver base adapters and then use some sort of weaver base ring (but this way I don't get a sloped base effect). Any other suggestions options welcomed. Cheers.