PGW Coyote and Timberwolf actions are top quality. The Timberwolf is designed from the ground up as an action for a SWS. These work great for 338 Lapuas. The Coyote is thesame, but is for the short action loadings.
They have integral pictatinny rails on top so no bases needed.
The machining is great and tolerances held to a proper level.
No need to true one of these when building on one!
They are not your typical custom action like Nesika. Nesike, while a super action for target shooting, is weak when it comes to a real deal SWS. Tolerances between moving parts are too tight and dirt will stop them from working.
Custom actions are easy to find, especiall with all the BR shooters out there using stuff like Pandas and Vipers, but they will not work for a real deal SWS.
Making an action is a long procsess that includes prototypes and many, many hours planning and machine time and set up, trial and error to get the bugs worked out. It isnt as easy as throwing some steel in a lathe and mill and knocking one out whenever you feel like unless you have done all the things above and have some 100K+ CNC nachining centers with all the fixtures made for said action.
That is why custom actions cost so much because the makers ahve to sell a large number of then at a high price just to get the investment back.
Now some guys aleady own a CNC machining shop, that is what they do for a living. I know an action makers that fits that bill. He however still has to dedicate a machine for programing, fixture making and trial and error for an action, while taking the machine away from whatever industrial parts it usually runs.
Bottom line is for a quality action it is not simple to do.
FWIW
Celt