In my inquiry re MIL v MOA, there was much debate but it appeared to come down to personal preference to most and it appeared that MIL had a stronger following but nobody would come out and say MOA was not ok. It was more a matter of what others were using in group events, everyone wanting to use the same standard. I was on the fence but an instructor at a shooting school that I highly regard said they use MOA at the school now but had used MIL in the past, that was good enough for me to tilt slightly in the direction of MOA.
As others have stated, dialing with dope cards, the come-up is just as easy with either although I've noticed that the MOAs are less finite, ie 3.1, 4.5, 7.5 vs 0.9, 1.3 or 2.2 for MIL if that makes any difference for people who need to wear glasses to read but don't have them handy for hunting/shooting.
I agree 257. It's a unit of measure. Get whatever one you feel best with. It don't make a bit of difference. I like mils, just since it is a 10 based system and I drag knuckles when I walk, but I can get along with either fine. Shooting is the difference, get to know either one or even both.
