Jasonmack, I noted at the 50 cal shoot we hosted last year that the concussion from both the Streyrs and AR50s was very abusive, to those standing near. Not being offered an opporunity to shoot 1 had no idea that the blast and recoil was hard on the shooter as well. I had been interested in reverse engineering the Steyr type brake, as an option on my rifles, but may rethink it now. I use a Holland type brake on the rifles I build and find them very pleasant to shoot. I shot my deer this year with my 50 and in the excitement none of us remembered ear plugs, none of us really noticed this until after the gutting was done, the noise was far less than a standard caliber rifle without a brake.
I can attest to the fact that the 750 Gr Amax is definiately a POOR bullet for hunting with. The bullet literally came apart like a grenade inside the chest cavity, the destruction is indescribeable. but NO exit wound.
The 750 Gr Wildcats did far less damage, I am planning to use an 800 Gr BTSP next year. Can't wait!!