This weekend I shot a Heym .600NE with 165 grs of IMR7828 with Barnes 900 gr solids vs the same load in the .600 OK. Both guns are very accurate at 50 yrds and it's easy to get 2 inch groups off-hand with either rifle. However, the felt recoil ( my aching shoulder ) says the .600 OK with a F990 pad, vias style muzzel brake, 3 groove rifling and three mercury recoil reducers in the butt kicks about 1/2 as hard!!!. A local buddy joined me in the antics and reported exactly the same thing. In fact it was hard to entice him to shoot the Heym more than three times period! Both of us were very willing to keep shooting the .600 Ok but not the .600 NE. The Heym with a 23 inch barrel and no brake hit 1950fps and the .600 Ok with a 26 inch barrel hit 2070fps with the same load. Under actual hunting conditions, I don't think the recoil of the Heym would actually bother me, but a steady diet would probably induce a world class flinch. I imagine some people would never want to shoot a gun like this again. The .600Ok at .600 NE velocities is an easy gun to shoot well. However, at 2400fps the torque of the gun becomes a very real problem.-Rob