Monday, January 7, 2013

Build #12 & #15 - His and Hers .300 Win Mag Custom Rifles


Sawtooth Rifles - Build #12&15:  .300 Win Mag, His and Hers!

A custom pair of mid weight hunting rifles with long range capability.

Spec's:

Sawtooth Rifles #12 "Netto"
Action:  Stiller Precision Firearms - Tactical 300
Barrel Blank:  Brux #3, Stainless, 4 groove, 1:10" twist, finished at 25"
Chamber:  .300 Win Mag
Stock:  Grey Laminate, Epoxy bedded with aluminum pillars.
Bottom Metal:  Rem BDL Aluminum
Trigger:  Timney, set at 3 lbs.
Rings/Bases:  Stiller 0 MOA rail and TPS Alloy rings, 30mm, lows.
Optic:  TBD
Finish, Metal:  Sniper Grey Cerakote
Stock LOP adjusted to 12.75" and Pachmayr Decelerator installed.


Sawtooth Rifles #15 "Brento"
Action:  Stiller Precision Firearms - Tactical 300
Barrel Blank:  Brux #3, Stainless, 4 groove, 1:10" twist, finished at 26"
Chamber:  .300 Win Mag
Stock:  Bell and Carlson Medalist with full length aluminum bedding block
Bottom Metal:  Rem BDL Aluminum
Trigger:  Timney, set at 3 lbs.
Rings/Bases:  Stiller 0 MOA rail and TPS Alloy rings, 30mm, lows.
Optic:  TBD
Finish, Metal:  Patriot Brown Cerakote
Finish, Stock:  Cerakote with Flat Dark Earth base coat and Patriot Brown, OD Green, and Armor Black camouflage


#15, in a pile of parts

Barrel blank chucked up in the lathe, ready to start the process of fitting it to the receiver and cutting the chamber.

With the barrel tenon features machined to mate with the receiver, it is time to cut the chamber with the chamber reamer.
Chamber time.

With the barrels screwed into the receivers, we could then do some fitting work on the stocks and get them marked for engraving with our proprietary method of getting the spelling right.

Hand cut engraving by Lewis Severn.


The barrels take one last trip to the lathe for the crowns.  We cut a recessed 90* crown on these.




 
With the machine work finished up on the barrels, they could be put in the barrel vise and torqued onto the receivers.

Final torquing of the receiver onto the barrel.



It is getting time to start turning these into rifles.  Here, the stock for #12 has been covered with painters tape everywhere except where the epoxy bedding will be, and the epoxy is laid in.

The aluminum pillars are held onto the receiver with some action screws, and epoxy is added to the crucial areas to try to eliminate air voids in the final bedding job.

The two halves are placed together and held with the "rubber bands" while the epoxy cures.  Playdough is used to keep epoxy from working its way into places where we don't want it.  Also, at this time we really hope we remembered to apply a release agent to the metal so it can be separated from the stock...

Well, the release agent did its job and they came apart revealing a perfect mold of the receiver on the stock.  Some clean up and trimming will take place now.

Cerakote time.  The small parts are all in one oven, #12 in Sniper Grey on the left, and #15 in Patriot Brown on the right.
The cerakoted barreled receivers bake in the other oven.



A length of pull adjustment is made to the stock for #12.

A new Pachmayr Decelerator recoil pad is selected for the stock.

The recoil pad is ground to fit.




Meanwhile, over at the Cerakote division, the stock for #15 has had its base coat applied and flash cured and the mesh wrap has been put on for the "Sawtoothaflage".



The finished parts of #12 laid out for final assembly.

And a few minutes later, #12 is a rifle.

After the camo cures on the stock for #15, it is laid out for assembly.

And #15 comes to life!

Partners in crime.

Test day!  #12 at the range.
#15 getting a work out.  Actually my shoulder is what got the work out.

 Range Report:

We shot these rifles with a few different factory rounds and some handloads that were developed for the #4 build.  We were more than happy with the results from the factory ammo, which will be the main diet for these rifles.  Federal Premium's 180 gr Nosler Accubond load shot under 1/2 MOA on our first test (under some numb finger conditions even).  We will be doing a little more testing with these rifles and then will get them set up with proper hunting scopes.




Keywords:  SR#12, SR#15