SKU: AC-05-422051-0612-05 Category:


The TAC338 is specifically designed for cartridges with a .585″ rim diameter such as the .416 Rigby, the 338 Lapua Magnum or the 378 Weatherby based cartridges. The TAC338 is also larger than the standard TAC action. It is 0.050 larger in diameter and 0.465 longer. That is needed to accommodate the 0.750 diameter bolt that is necessary for these cartridges. The TAC338 actions have no feed lips and use only center feed box magazines. Bottom
metal with magazines are available from a variety of sources. The TAC338 actions use a straight bolt handle with a threaded bolt knob. It comes standard with a small tac knob that can be swapped with aftermarket bolt knobs by the user or a gunsmith. One piece picatinny rails with 0, 20 and 40 moa cant are available. The bolts have a new proprietary coating that makes them as smooth as glass.
Receiver Material: 416 Stainless hardened to 42 Rockwell
Receiver Length: 9.165”
Receiver Diameter: TAC338 – 1.40”
Headspace: 1.100”
Headspace tolerance is held to +/- .001”
Tenon threads Threads are made with a single point boring bar and indexed to top center of action. This allows any barrel ever fitted to a Stiller Action to be screwed onto any other Stiller Action without need for re-headspacing or re-indexing.
Bolt Design: .750” diameter
One piece fluted on top and sides but not the bottom so that flutes will not interfere with magazine lips. TAC actions have straight bolt handle. Bolt knob is threaded and comes equipped with a small TAC knob. Aftermarket knobs can be swapped out by user or gunsmith.
Bolt Stop: On side of receiver opposite bolt handle above the stock line
Bolt Throw: 90 degree
Bolt Material: Chrome Molly hardened to 42 Rockwell
Bolt Coating: Proprietary double layer coating makes them as smooth as glass
Firing Pin: Fluted Stainless Steel, .068 diameter tip, Chrome
silicon spring
Extractor/Ejector: Modified M16 type extractor, Rem 700 style
pin ejector
Recoil Lug: 416R Stainless parallel sided or tapered. .187” (Rem700 standard) or .300” produced in house and surface ground to
.0002” tolerance.

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