yes, what MSP Ret said. Same advice here, move the ramp where the shot needs to go.
You're not alone on hitting different points of impact with different shooters. Several of my buddies use my "dead eye and calm nerves" for verifying their rifle sites. Seems a lot of shooters, and don't take this the wrong way, are skittish and it shows when they pull the trigger. My guess is if you're right handed, you're pulling the shot down and to the right. Try seating both the forend and buttstock firmly in sandbags. Use only enough contact to snug your shoulder on the butt, and keep a relaxed hold on the grip and squeeeeezzzzeee the trigger.
Let us know your 100 yd results.