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 in on my 22-250. The scope would not zero, we were using a torque screwdriver in inch pounds. I thought we did have it too tight, anyway I talked with the tech at Swarovski who told me that. after much frustration there was 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.