Next 3 gun match I'll be shooting will probably be 3/4 at Wilkesboro. It's an IDPA club match. Mag capacity is limited, but it's still worth going to shoot.
There are other matches at Carthage, Oxford, Bunn Level and Raleigh. Entry fees are usually $20 for non-club members. Round counts vary, go prepared typically with 250 rifle, 250 pistol, 50 slug, 50 buckshot (00, #1, I use #4), 125 bird (many use 7 1/2 shot, I have better results with #6) and you'll never have an ammo issue. That's not to say you'll shoot all of it, but better to have and not need than.... Most matches will publish a round count, but bear in mind that published round counts are based on you popping every target exactly correct the first time, all steel falls first time, etc. The list I gave you will suffice for about any club match. All you will need to do before the next match is replentish the ammo locker. Big matches are an entirely different animal and can eat up lots more ammo.
Go to -
www.USPSA.org
www.IDPA.com
and do searches for 3 gun club matches.
The "definitive" site for 3 gun big matches, info, gear, etc, as well as other competitions is-
http://www.brianenos.com/forums/
There is a whole section devoted to 3 gun issues, guns, techniques, gear, etc.
As for big matches in NC, there are two "must shoot" matches per year in state. The Recon match, aka Carolina Tactical Invitational, is in late June/early July at Range One in Oxford. The second is the Fayetteville FOP match, last held in Sept. of 05. The Recon match is great fun, mostly a military type of flavor. The FOP match is more SWAT/assault stuff. One cool thing about the FOP match is the shoot house. It's a 360 shoot house, done both lit and dark with flashlight usually entered after the door is blown, yes blown open. More than one shooter has felt pretty stupid standing stunned at an open door after the charge goes off. You'll also shoot out of a rappelling tower, armored personnel carrier, police cruiser, police bike, shotgun assault through woods, you get the picture. Rifle shots can get out as far as just over 200yds.
If you're shooting an AR platform, a standard AR milspec sight can be a bit dicey at that distance with a milspec .072 front post. I'd recommend making a cheap adaptation and install a NM front post at the very least on irons. IIRC, the NM post is .050. That .020 can make a difference in a hit and miss due to how much of the target is obscured by the larger post. That doesn't mean an AR carbine isn't effective, just that the standard stuff needs tweaking. We just installed a NM front post on my son's AR last weekend, the post was about $9 at the gun show and it makes a world of difference. Also, I can't emphasize enough having extra pistol and rifle mags. You will need them, but don't let that hold you up from a match if you don't because there's usually someone there who will lend a mag or two. Most guys who shoot 3 gun are great folks. You'll also need some method of carrying extra shotgun shells. Walmart has a buttstock carrier that holds 5 shells and many 3 gun guys buy one or two and put them on their arms so they can reload quickly.
I think the most cool things about 3 gun are movement and variety. No two matches are ever the same, even if held at the same range. You will always have to move from position to position, shoot from award stances and think through what you're doing while under pressure to be both accurate and fast. I've shot a number of types of comps and this is the only one that gets my adrenaline pumping and will keep my interest going because you never shoot the same match over.
Johnny- PM me if you're interested in Wilkesboro and I'll send directions. It isn't easy to find the range. And don't blame me when you get addicted to this stuff