There's not a definite answer. Action type, ring width, and choice of base are all factors as well as available eye relief. Possibly the greatest flexibility is with a Weaver/Picatinny one-piece rail as iit allows variable ring placement, but looks out of place on some rifles. Extension rings can help, but also look funky to my eye.
Look at the drawings on the website spec section for the various models and use the measurements to cobble together an idea of the usable tube length and position of the turret. The drawings are not to scale.
If you know someone with one of the models you're looking at, you can eyeball it beside your rifle. As a last resort, I suppose, you can take your setup to a dealer and check it against the scopes in stock. That convenience is one thing that justifies the higher prices they sometimes charge. Finding a local dealer with all those models in stock, particularly the fixed powers, may be a challenge.
If you provide the details of your setup, the folks here may be able to give you an idea of what has worked for them, maybe even pictures.
Good luck.
Last edited by Pappy348; 03/02/15.
