How's the 307? I bought a Mack Bros Evo II stainless SA and it's at the gunsmith with a Bartlein blank. The Mack Bros action being a 700 footprint, but not threaded to accept Rem 700 pattern barrels is a bit of an inconvenience. The 307 *does* accept profit Rem 700 barrels, correct? If so, I may switch the receivers.
Model 307™ Builders Action – Weatherby, Inc.
weatherby.com
Pretty sure both are 1.0625x16 TPI