Sometime back I posted on here and other sites looking for load info for my 6.5/300 wtby. I got some good info that really helped me find a load that shoots well. My friend is looking for some load info on the 6mm mach IV. He has the guns and ammo article by Ross Sefried. The info on there list wc872 And AA8700 for the 105-107gr bullets. Has anyone used any other powders for the105-107gr bullets? thanks in advance.