Mag-Na-Port brakes are hard to beat. I had a Mag-Na-Brake on a Weatherby Accumark in 300 Win Mag and a buddy of mine had a Browning Stainless Stalker in 300 Win Mag with a BOSS and mine kicked a lot less. The Mag-Na-Brakes cost about $195, the price includes matching the finish of your gun, they matched mine perfectly.

http://www.magnaport.com/