subway - what kind of target shooting do you want to get into? Some are easier to do with a factory rifle. Here's a choice of a few broad catagories:
1) NRA across-the-course competition. 200, 300 and 600 yards all in the same match. Standing, sitting and prone. Slow fire and rapid fire. The .223 AR-15 is the overwhelming favorite for this stuff. No scope, just sights. There is an experimental optical class using scopes, but it's just starting out at this point. Very easy to break into this sport with any decent AR-15 and factory loaded match ammo. Matches generally are either 50 or 80 round courses. Lots of fun!
You can also use a bolt-action rifle in the "match rifle" catagory. My choice is a .308 Win Model 70 that I'm now using for both cross-course matches and long-range prone matches. This could also be done with a factory "varmint" type rifle fitted with match sights.
2) Prone competition. Generally from 300 - 1000 yards, all fired at one distance. Typical match is three strings of 20 shots. Palma is also fairly popular, 15 shots at 800, 15 at 900 and 15 at 1000 yards. Palma requires a .308, or some brave folks are doing it with .223's. If youi're not shooting Palma, you can use a scoped target rifle in what's called the "any rifle/any sight" class. This is a good one for say a factory built Rem 700 VLS in 6mm Remington, .243 Winchester or even .308 Win. Factory rifles and barrels are not optimal, but will work. I've shot conventional prone matches with a factory built Rem 700 and done just fine.
3) F-class prone. Growing fast and becoming very popular in some areas. Take a factory built varminter, put it on a bipod, lay down behind it and bang merrily away at the targets! Held out to 1000 yards, but many matches at shorter ranges. The .308 is an excellent starter round. When you wear the barrel out in 4000 rounds or so, you can change up to a .260 Rem, a 6.5-284 or any number of flatter-shooting cartridges that do better in the wind.
4) Tactical competition. This one is a wild card, the matches are scattered about. Some places hold them regularly, others are few and far between. It's pretty popular. Some are a lot like F-class comps, mostly prone shots. Others are strenuous and very physically demanding with a lot of hiking, climbing and maybe even some running involved. Again, a factory built .308 with a varmint barrel can do fine. Heck, I did real well with a little old Rem 700 VS in several of these matches.
**Somewhere in here it dawns on me that I keep recommending a factory built bolt gun in .308 with either sights or a scope, depending...**
Okay - now we're out of "my" kind of matches. Benchrest... Hmm.. I've seen it done a couple of times. These guys shoot one shot into the target, then put the rest over the target into the berm beyond and try to convince me that they actually put five shots into one hole.

There are some different divisions of equipment in benchrest, but I'm not the expert.
Around here "Hunter Benchrest" is the most popular. Matches are shot with the rifle rested on sandbags on a solid table. Scopes for Hunter Benchrest are limited to 6x. Accuracy is phenomenal. Most of the guys here are shooting some derivative of the .308, with custom made bullets. Benchrest comps are held from 100 yards to 1000 yards, depending on the range available, and the exact discipline being held.
Help me out here benchresters - I don't want to start lying to subway or exposing any more of my ignorance of Benchrest competition! :crazy:
I'm glad you're considering competition. I'm a much better shot because of it - and it shows during hunting season!
BTW - nice choice of hunting rifles with that .30-06 in the 700 CDL! :thumb: I treated myself to one in .25-06 last year and it took a decent mulie buck about a half an hour into the season in October. Nice rifles.
Regards, Guy