I see you are from Colorado, That's a good thing, Get hold of High Tec Custom Rifles, Colorado Springs, His Name is Rich Riley, His brakes are 65% reduction
He will thread barrel and build Brake for around 170.00 you just cant beat his Brakes, I have bought 2 of them and plan on buying 2 more.
719-667-1090 This is his phone # Good Luck! My 300WM shoots like a 223