GG,
No I haven't. I beleive I have heard of the Firewalker but not the Gateway match.
Here are the ranges I have fired at:
1000yd - Colorado Rifle Club in Byers, Co
1000yd - Iowa 1000yd BR Club in Pella, IO
600yd - Varmint Hunters Association in Ft Pierre, S. Dakota.
I have never...