Dont mean to hijack, but if you are going to shoot 180's, why not get a .300 RUM ? I mean it can push a 180, 300+ fps faster. I understand the .284, 180gr VLD has a .659 BC, where as the 185 .30 cal has a .549. But at 1000 yards the speed is almost identicle.
My velocity is 3050 FPS, and I seat them at 3.665 OAL so they fit in the mag. I have had better luck seating the Bergers deeper, rather than at the lands. My hunting buddy killed a whitetail this year from 1105 yards using this load. Here are some pictures of 1000 yard groups with the 180's.