Two or three years ago I borrowed the scope off my 243wssm for black powder in Arkansas, that proved to be a good choice. Since then, I tried to install it on my 22-250. The scope would not zero, we were using a torque screwdriver in inch pounds. I thought we might have it too tight, anyway I talked with the tech at Swarovski who assured me that was the case After much frustration there were two different thickness in the bases. Yesterday it all got right and produced a 7/16 caliper measured outside to outside shot group. The scope is a Z-5 and the gun is a Browning Stainless Stalker with BOSS and break. Ballistics are same as 25-06. I put a Nikon on the 22-250 and a Leupold VX-2 on the muzzleloader. All is good.