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’s first new action in over 50 years. The Model 307 was purpose built to accommodate the vast offerings of stocks, triggers, rails, mounts, and bottom metals that exist in the marketplace. The 2-Lug bolt features a convenient “tool-less” takedown for easy disassembly and maintenance...
weatherby.com
Pretty sure both are 1.0625x16 TPI