Quote Originally Posted by elkins_93 View Post
So my factory bolt for the 30-06 would take say a 300 wby case?

No. that is not in the 30-06 or 308 family. You are looking at 22-250, 6BR (as a single shot), 243, 250-3000, 260, 6.5x284, 7-08, 284, 308, 338 federal, 358 Win, 25-06, 270, 280, 30-06, 338-06, 35 Whelen, or any wildcat that is based on the 250, 308, or 30-06 brass. There is probably a few I forgot to mention but that's the main list.

All of those cartridges have a rim diameter of .473". The 300 weatherby and most other magnums have a rim diameter of .532".