Where you seating your bullets in relation to the lands?? Only powder I"ve tried with the 168g VLD was RL-22. Shot great for me at 63g giving 2950fps. I might give Retumbo a try the next go round with the 168's, and/or maybe the 180's. I've tried Retumbo/162g amax with so/so results, shooting 3150fps, but accuracy seems to stay 3/4" between 3000-3150fps. I've always wondered about those marks on the case head myself. I've noticed that when you seat bullets out to touch or go into the lands, just by chambering and unchambering the round will leave those kinda shiny marks on the case head. Kind of annoying I think. Is that alwasy a definate sign of pressure?? I tried a couple loads the other day with 68-70g H-1000/160g AB and I'm pretty sure I got pressure starting at 68g, velocity was right at 3000fps, and I got shiny marks on the case head.