Weatherby 307 Builders Action Short Magnum 1-1/16-16

The Weatherby Model 307 Builders Action Short Magnum is a bolt-action builders platform designed to accept a wide range of aftermarket Remington 700-compatible stocks, triggers, rails and bottom metals. It features a 2-lug cylindrical bolt with spiral fluting and an M16-style extractor for reliable function. The bolt and bolt knob are finished in Graphite Black Cerakote and the action is prepared with standard tenon threads for common aftermarket fitment.

Key Specifications

• The action uses a 2-lug bolt with tool-less takedown for easy disassembly.
• The bolt is a spiral-fluted cylindrical design with an M16-style extractor.
• The bolt throw is a 90 degree throw.
• The bolt and bolt knob finish is Graphite Black Cerakote.
• The bolt knob threads are 5/16-24.
• The headspace is listed as .899 +/- .000 (Bolt Face to Recoil Lug) in the manufacturer details.
• The tenon threads are 1-1/16-16 and are specified as .880 long (Standard 700).
• The breech counterbore dimensions are .740 depth (measured from tenon shoulder) and .715 inner diameter.
• The mag box length for the short action is 2.97".

The Model 307 builders action delivers a practical, Remington 700-compatible foundation for custom bolt-action rifle projects, offering common tenon threads and a compact short-action profile to simplify sourcing aftermarket parts. Its tool-less takedown and proven extractor design make routine maintenance straightforward, while the Cerakote finish on the bolt components helps guard against corrosion during build and use. For builders seeking a versatile short-action platform from Weatherby, the 307 provides the dimensional and interface standards needed to assemble a tailored rifle.