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Most of the long range shooters I think prefer a tapered base of 20 MOA or more and that is normaly a Picatiny rail type base..........Will a Dual Dove Tails accomplish this?
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Yes,
I use dual dovetail bases with Burris Signature rings on them. With a 30mm tube I get 20 moa of "taper" and with a 1" scope tube you can get up to 40 moa in 5 moa increments without having to buy a whole new base. Signature rings don't need lapped and will never mark or dent a scope.