Re: .300 win mag brass?
Hi Matt, I also have a Remington Sendro in 300 Win Mag. The Action has been trued, Kreiger barrel, muzzle brake, and the trigger lighten. I've shot a .189" five shot group at 100yds and a .685" three shot group at 400yds with it. The load I use is 68gr AA-4350, Federal GM brass weighed to within 1 grain, Hornady 178gr A-Max, and a Federal 215GM primers. I just got some Norma cases but haven't worked up any loads yet. I used to think that factory barrels were great but after having a few custom barrels, I was wrong. I've had some custom barrels that I'm not impressed with while others I'd buy in a heartbeat. Something else I've learned. I don't care what kind of barrel you have. It still comes down to the loads. Good luck and good shooting
The Big Dog, Ed Coffey