Yankytrash, yes, we Highpower shooters shoot long distances regularly. The NRA Highpower Rifle matches are typically shot at ranges of 200 yards (standing slow fire and sitting rapid fire), 300 yards prone rapid, and 600 yards prone slow fire, all with open sights. Highpower rifles are divided into two categories, Service Rifle and Match Rifle. In Service Rifle, we shoot rifles that appear as the as-issued military rifles and in the original calibers. This consistes of M1 Garands, M-14 (M1A)s, and AR-15s. Only interior mods can be made (trigger, barrell, bedding, etc.) and the sights can only be upgraded slightly (strict rules allow for only a limited amount of improvement). Match rifles are kind of an "open class" where the guys can shoot just about any rifle they wish with jsut about as many mods as you can imagine...they still use open sights, but they're pretty high tech open sights, to be sure. Palma shooters typically shoot at 800, 900, and 1000 yards and use Match Rifle setups mostly.
The targets are not all 12". The aiming black of a Highpower target is 6 MOA across at all distances. At 200 it's about 12", at 300 it's about 18", and at 600 it's about 36". The x ring is always 1 MOA. The 10 ring is 2 MOA. (The 10 ring at 600 yards is 12" across)
The 200 yard standing is typically the hardest position to master, and as the saying goes, "Matches are won at 200 standing, and lost at 600 prone"
Wind at 600 yards and above constitutes the biggest problem at 600, as the position is very solid and if you had absolutely no wind, the shots wouldn't be that hard. The Masters and High Masters are real artists with reading wind.
I'd REALLY like to encourage you to go watch a HP match, and go to a "clinic" match. There you'll shoot "across the course" and find out what a match is like, and get some coaching as well. Also, look for the book "Highpower Competition" by Rudolph Constantine. It's probably the best primer you can find.
TFL, whlie a great resource, has it's limitations. It's not much for the HP scene. There are a lot of HP guys at
www.ar15.com in the Compeition section, and at
www.shooterstalk.com in the Highpower section. Also check out the Florida Highpower Delphi Forum, at
http://forums.delphi.com/flahighpower/messages I know it's not your state, but only about 50% of the posters there are from Florida...it's a great forum.
If you think yuo're interested, please shoot me an email.