I will try to give you some straight advice. If you are interested in .22 Benchrest shooting, you should, if possible, attend a match near you and look at the equipment being used. You will notice that there are very few over-the-counter .22's being shot.. 99.9% of the rifles will be custom built rifles or factory match rifles, ie: Remington 40-X's, Suhl's, Anschultz or Winchester 52's. ALL of the rifles will have factory 2 oz. triggers or after markert 2 oz. triggers. There will be a few factory barrels on the rifles, but the majority will be after market Shilen's, Llija's, Benchmark's, etc. barrels. Most BR rifles will have a 36X scope of some kind on them, some will have 40X and 45X scopes. The stocks will be fiberglas or custom wood stocks. The ammo that the competitors will be shooting will be 99% Eley, with a sprinkling of Lapua or RWS ammo. The ammo will cost a minimum of $10.00 for a box of 50. So much for the rifle and ammo. Now, you will notice that most competitors are using one piece rests, made by Pappas, Alan Hall or Von Aherns. Some competitors will be using two piece rests with a windage adjustable top. There are several different manufacturer's of the rests. Next, you will need a good set of wind flags, 4 minimum. Again several different makers of wind flags. Then you will probably need a tuner.. There are a couple different brands of tuners, most use the Harrell's or a clone of the Harrel. Now, the ammo search.. You will probably have to buy several different lots of whatever ammo you decide to use. Different lots mean different machines and different lot #'s off the same machine. You can get some help on that by asking around this forum or other forums. Once you find a lot number your rifle likes, buy at least a case of it, as it probably won't be around long.. THEN, shoot the rifle and test, test, test. To be competitive in the .22 BR game, your rifle should be able to group .200" or less most of the time. I'm talking 3 shot groups at 50 yards..
Cost to get started...SIT DOWN... your are looking at a minimum of $3500.00 to get started. That is minimum.
Where to find rifles.. You can check the Benchrest Central Classifieds or other forums classifieds.. There are several very good rifles for sale in the classifieds..
As far as who builds rifles. There are several good gumsmiths that can build you a good rifle. Here is a few, but Gene Davis, Richard Gorham, Bill Calfee, Butch Hongisto to name a few.
......
Dave