I have box of 6.5 GMX 120gr bullets BC (G1) .450. Lead-free.... I've tried them in 3 different rifles 6.5x55, 6.5-06 and 264wm. They don't shoot worth a darn in any of the above rifles. Just wondering if there is some secret to getting the to shoot good. I don't have any experience with solid bullets but I like the high BC, light weight which to me means better velocity. Hornady load data wants them loaded like a 129gr bullets. I'm thinking seating depth is my issue. Any one got a handel on them?