I have a .338 Edge Shawn Carlock put together for me. It is on a Rem 700 action with a Broughton 5C 1/10 twist stainless barrel. NO FLUTES. 30" finished length with Shawn's muzzle brake
in front of that. Shawn's first 3 shot test group was .337" with a Horus Hawk 3-12-50 scope I furnished for the build. When I received the rifle I changed the scope to a Horus Falcon4-16-50.
I use Nosler's 300 RUM brass necked up to 338. After neck expansion its .020" short but has not caused a problem. Nosler brass case capacity is about 5 grains H2o less than Remingtons as the cases are about 5-7 grains heavier than a Rem. case. Load development with Nosler brass will need to be adjusted for capacity.
I moly coat my bullets and the load I use is 92.5 gr. H-1000 for 2745'/s. the group Shawn shot was no fluke. The rifle will consistently group in the 3/8" range whether at 100, 500 or 1000 yards. my best off of the Bench @ 1000 was 3.5" Almost all will be under 5". I have shot as many as 60 rds in one day and 1 session. The barrel does not foul, almost no copper and very easy to clean.
After the success with thee .338 Edge I had Shawn build another rifle. 6.5/284 Norma. 30" Fluted Stainless 5C BROUGHTON AND HIS BRAKE. It is wearing a Horus Raptor 4-16-50 scope. It is as accurate as the barrel on the Edge and cleans as easily.
That said I would highly recommend a call to Tim North @ Broughton barrels. I don't think you would be unhappy at all.