Ross Schuler makes fine, economical breaks. I purchased one from him for my 450 BM. Google him and you won't find an ill word said about his products. And they work well.
Have you actually shot this rifle and decided that you need a break? I do not find the recoil of a .308 to be too offensive. Not trying to be insulting, just curious. Tank or shark style breaks are very effective but make the rifle look bad in my opinion.
is it already threaded? This could add between $50-150 depending on who you have cut your threads...
I second Dirty Steve's advice and think you should shoot it first.
the rifle is a ruger precision, so already threaded. Ive never shot .308. but if i am going out to longer ranges ive heard its hard to see the shot with out a brake to manage recoil.
I'm with the other skeptics who have to wonder if a break is really necessary.
With that said, I would have suggested good old MagnaPort, were it not for your mention that it's already threaded.
I like some of the options people have suggested. I a surprised to be steered away from a muzzle brake. Under what condition do the skeptics recommend I reconsider one?
The question should be, do you plan on getting a suppressor? Does the Suppressor have a quick attach capability....If so, get a muzzle break that matches that.
Many brakes are considered 'loudeners' as they direct muzzle blast both at your neighbors and back to you. I have several 7.62NATO chambered weapons and only us a flash suppressor (not a brake) on one of those and have no issues with recoil.
I'd second the suppressor recommendation...now if they'd just get rid of the registration and taxation issues...
The "skeptics" are saying that the .308 recoil is not too offensive and does not preclude being able to see hits on target. I clearly saw a hit on an elk I dumped at 426 yards with a .30-06 several years ago. The recoil of the .30-06 is comparable to that of the .308. If you find that it is more than you can deal with, many brake brands are effective. Steer clear of one though with bottom ports if you plan to be shooting prone. You'll likely end up with a face full of dust and debris. Personally, I like the defensive edge brakes.