Here is something I saw and ordered and thought others might want to use also. I had a couple custom turrets made one for a 243 win shooting 69gr Bergers at a little over 3400 fps and one a 22-250 for 52 gr Bergers we'll I had a rifle built and put my scope on my new rifle which now shoots a 69 gr Berger at almost 3600 fps. We'll the turret was pretty close but at ranges over 400 yds it started to be off and the farther out something was the farther off the custom turret was. Now I needed a new turret and they were pretty spendy then I came across a web site called custom turret systems they make a sticker like wrap that is calibrated for your turret and load for only $25 for four wraps. They seem pretty sturdy like they will hold up well and stay stuck on also. I sent him my info and I four days I had them I put them and wow they shot them out to a little over 400 yds so far and they were right on the money