I have found a range that is having a 600 yd benchrest shoot for hunting rifles. My 6.5 Swede load is pushing the 140 A-Max right at 2800fps. My question is this: How many quarter minute clicks do I need to add to my Meopta scope to obtain a 600yd zero from a 100yd zero? I am not confident with my math while taking in the consideration of the high BC of the 140 A-Max.