I am a relative newcomer to the 3 gun world. I've been focused on 3 gun for less than a year and only have two big matches under my belt, 2009 SMM3G and 2009 RM3G. I think the furthest target at SMM3G was just over 300 yds and i shot that match with my aimpoint. It was what i had a the time. I love the aimpoint but i new for RM3G i needed a variable power optic to be competetive in tac scope so i bought a Meopta. I busted my ass all summer to become a much better rifle shooter, get a really, really good zero, load 77's and figure out my ballistics to hit the shots i knew i was going to have to hit at that competition. I ended up doing waaay better than i thought i was mostly because of my ability to hit the longer range targets. I saw people shoot at the long range targets that were much more experienced rifle shooters than myself that crashed and burned. They didn't do their homework. Maybe they didn't have a really really good zero, and they probably didn't practice what they probably knew they should have. This is what i love about 3 gun. You have to work hard to be competetive and make the tough shots. You can't just go out and buy fancy guns and go shoot. Your shooting faults will become apparent pretty quick on challenging stages. Realistically i think around the 400 yd mark is perfect for 3 gun. Most of the targets will end up being between 200 and 300 but i think you need those father targets to add some real difficulty and reward the shooters that will work hard to be prepared.
Don't get me wrong, i love to run and gun with my rifle but i want to shoot both ends of the spectrum when give the opportunity.
Also a +1 for the target size issue, 3 MOA targets sound great. The targets are RM3G that had the yellow backers you could see really well for the most part.
Just my .02 cents!
Mark S.