Re: muzzlebrake and reloads
Anything added to the barrel will affect its harmonics so you can expect that adding a muzzle brake will have some influence on your accuracy. But it's not an insurmountable issue. A little work on the load or seating depth may be all you'll need.
Just keep in mind that, typically in a prone shooting position, a muzzle brake will throw pieces of whatever is under the muzzle onto our neighboring shooter at the range - how much it throws depends on its design. Also, you may need better hearing protection.
I have a great woman, fantastic kids, a warm place to sleep and an accurate rifle. Life is good ..............
Hunter Safety Instructor - California Hunter Safety Meritorious Service 1971 - 1972. Rifle/Pistol Marksmanship Instructor - NRA Life Member
American rifleman's triad - God, guts and guns. It built America and it'll preserve America. Abandon one and you lose them all.
As iron sharpens iron, so one man sharpens another.