Picked up a M11 in 300 WSM. Going to sell the sporter barrel and replace with a 7mm WSM.

This will not be for hunting, but specifically for bench rest shooting. I already have a .308 and am looking to build a 260 in the very near future.

I want to use the high BC 7mm bullets available and I already have a M11 action setup for WSM calibers.

I'm looking for a 1.25" straight barrel in large shank pre-fit. Barrel length: 30"? Suggestions on length. I need weight to better handle recoil. Also, thoughts on muzzle brake? I know the WSMs kick like mules and want to tame recoil as best as possible. No hunting and strictly bench, is a muzzle brake ok? How does it affect accuracy?

Where are the best places to look. I don't mind spending a little money for a good barrel. I don't think Jim at NSS has a 7mm WSM reamer.