I've been shooting PRS and NRL matches for 10 years now. Even won the state championship in 2011. 6.5x47 has been my caliber of choice during that entire time though I have a switch barrel in 223 AI which gets occasional use. Getting ready to mix it up with a switch barrel 6.5 Super LR. Used to run an AI chassis and 5.5-20 NF NXS; SFP. Now, a 6-24 IOR, FFP. FFP's can really save the day with a COF has multiple targets at multiple ranges with multiple positions; saves time NOT having to dial when time if critical.
Their is a reason you don't see AR's in the hands of experienced/nationally ranked shooters....They are hard to consistently shoot well from varying positions.
MIL or MOA. Probably depends if you can easily think in 10ths or quarters/1/4's. I'm retired Army and now the MIL system but i'm also old enough to feel more comfortable with MOA/inches. I also like the fact a 1/4 click is more precise measurement than a 1/3rd click for MIL when setting my zero.
YMMV.
Alan
