John Lacys book on the Remington 700 is a must have for anyone who really is a fan of the 700. In it he goes into great detail about these 3 chamberings and the 280s unusual introduction, re-introduction, & re-re-introduction. There are several rare chamberings in Rem 700 history. The 7mm-06 is the rarest of them all. The 7mm Express Remington and the dual stamped 7mm Express/280 Rem are also rare and somewhat hard to find anymore. Thanks for the looks and compliments. 163bc