I've been doing a lot of dialing in from 100 yds to 500 yds in practice trying to get used to this style of shooting. I'm using a Rem XP-100 .222Rem Mag Imp w/ 52gr A-Max's at 3200fps. Using the Excel sheet from Dave King I got all my MOA dial-ins and been having a ball!! The vertical is dead on to 500 yards...perfect! But as I go out and dial in for each distance from my 100yd zero...the shots are walking to the right. At 200yds they are about 4" to the right, 300yds is about 8", 400yds is 16" and the 500yd groups are about 24" to the right. The groups are good for a beginner...2" at 300yds, 3" at 400yds and grow to about 6" at 500yds. I've also been watching the wind...but it does this is all conditions...calm or windy. I have a few other LR set ups in both rifle and handgun that are NOT walking as the scope is dialed...only this one seems to do it. The scope looks to be mounted straight (not canted but I'm terrible trying to get a scope straight)...the scope is a Burris 3-12x32 EER w/ target knobs and PA. It's mounted on a Weaver base w/ Burris steel Signature Zee rings. Any ideas?? Thanks.