Free: Contests & Raffles.
I would say the best bang for the buck is going to be HS precision. I like HS Precision over bell and Carlson, I like the feel better in the HS. There are for sure, better stocks out there, like manners, McMillan, or chassis. I have a B&C, its does its job, but I think Quality Control is a little higher in HS. Muzzle brake, I went with Benchmark Barrel's Miller Brake. I can shoot my 300 win mag all day long and not complain. I would give your barreled action to Benchmark, have them true it, and put on a medium palma barrel, and thread on a brake. Benchmark is a great company. I shot a 6.5 creedmoor this weekend they put together in that config. and it shot great. A medium palma is heavy enough to stay rigid with repeated firing, but light enough to move it around when you need it.Honestly though, if you bought or have a stock that is rigid enough and just put good glass on it, you can shoot long range. You don't need a 1/2 minute gun to shot long, you need a 1 minute gun or better. Most R700's are capable of that. Buy glass,ammo and shoot.
This seems to be the case with the Remington long ranges. I have rebarrelled a bunch of them. A guy is almost better off buying a cheap adl and building off the action. Then you know exactly what your getting and will perform under .5 moa consistently.