I built mine on my hunting rifle action..... a Remington model 78. Which is a very plain remington 700 ADL. It has no knurling on the bolt handle and no jewling on the bolt body. It was formerly a .308. I just never hunted much. I bought this rifle in excellent shape for $350. I got lucky and bought a used 30 BR barrel from a competitor friend for $200. It had less than 200 rounds down it. Every model 700 part fits on my model 78 so parts are easy to find. I had the barrel rethreaded as it was on a PGW action and the threads didn't match.
All said and done I spent about $1000 to build it.
I have a Redding set of dies that uses a 6mm -30cal expander ball. So neck sizing up is literally one stroke on the press......just lube it well
As for bullets, I use 125 grain Speer TNTs or 110 grain Hornady V-Max and they easily shoot into the .300 consistantly. My competition Match rounds are 115 grain Bergers which I purchased from Mysticplayer from this site. This load will give me honest 1/4 inch groups@100yards.
There is only one powder that you need to buy. H-4198. 32-34 grains will get you where you need to go. My barrel is a 1:18 twist so I can't stabalize 135 grain bullets.
I currently own a full blown custom 6BR and a fully tuned factory Savage LRPV in .223 with a 7 twist. Niether shoot as consistant as my 30BR will.
Rediculously easy to tune. Thers not much to do. They just plain shoot well..
If cost is an issue, then you may want to look elsewhere. Dies aren't cheap and niether is brass.
How many rounds do you shoot per year. Will you wear out a barrel in a year or two shooting 3000 to 6000 rounds??