hey I have a 110 with accutrigger and long action that has weaver style 2 pc mounts and rings, I need to move the scope back more for proper eye relief. I like the looks of the one pc rails with ring grooves all across it. how do I determine if I need a moa mount (like 20 moa)? and does anybody have the part number for the right base? I don't shoot the gun much just during deer season and occasionally at targets and my longest shot would be about 200 yds but mostly around 100 yds. oh and it is a 270 win. thanks for any replies