Ok, I've decided to build a 6-284 as my long range varmint rig. I know it is overbore and a barrel burner. I will be shooting 105 gr bullets. Hybrids and Amax if they ever become available. It seems RL22 and F210 are popular. It will be on a Savage PTA and either a Pacnor or Shilen prefit 8 twist. There are two choices for a neck. Either a .270 or .277 neck. I will be using 6.5-284 Lapua brass. I'm going to assume the .270 is a tight neck. I don't mind turning necks if it will help. What should the freebore be for the 105's? Is there anything I need to know about this caliber? Thanks in advance.