TAC 338

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TAC 338

Whether you’re hunting big game or shooting extreme long-range competitions, the TAC 338 delivers a rock-solid foundation for big-bore builds. Engineered specifically for .585-rim cartridges (for example: .416 Rigby, .338 Lapua Magnum, and 378 Weatherby cartridges), the TAC 338 action features an enlarged bolt face and larger footprint to safely handle high-pressure, large-diameter cartridges.

Current lead time: 12-14 weeks

  • List Price: $
  • $

TAC 338 Specs

Receiver Material Receiver Length Receiver Diameter Headspace Bolt Diameter Bolt Design Bolt Stop Bolt Throw Bolt Material Bolt Coating Firing Pin Extractor/Ejector Recoil Lug
416R Stainless 9.165" 1.4" 1.365" +/- .001" 0.747" One piece fluted on top and sides, with a swept bolt handle. On side of receiver opposite bolt handle above the stock line. 90 degress 4140 Black Nitride Fluted Stainless Steel, 0.067" diameter tip Modified M16 type extractor, Rem 700 style pin ejector 416R Stainless parallel sided or tapered. .187" (Rem 700 standard) or .300" produced in house and surface ground to .0002" tolerance
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Quick Specs

Body, Bolt, Rail, Recoil Lug, & Trigger Pins

35.902 oz

Action Body

19 oz

Bolt Only

13 oz

For the next generations

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What calibers fit the TAC 338 action?

The TAC 338 is designed for cartridges using a .585-inch rim diameter — typical examples include .416 Rigby, .338 Lapua Magnum family, and many 378 Weatherby–based cartridges. Always confirm specific cartridge dimensions before final build.

Is the TAC 338 the same size as a Rem-700 action?

No, the TAC 338 has a larger footprint: +0.050″ diameter and +0.465″ length compared with a standard Rem-700 style action to accommodate a larger bolt face and stronger locking surfaces.

Will the TAC 338 fit my stock or chassis?

The TAC 338 fits many big-bore stocks and chassis, but because the footprint is enlarged you should confirm action-screw spacing and inlet dimensions with your stock/chassis manufacturer before finalizing the build.

What is the current lead time?

Current lead time is 12–14 weeks from order.

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Tenon Threads

1.0625-16 UN-3B

Made with a single-point boring bar and indexed to the top center of the action.

This allows any barrel ever fitted to a Stiller Action to be screwed onto any other Stiller Action without any need for re-headspacing or re-indexing.

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