Boyd & Mike,
DGA with a flat bolt nose. Receiver face to front of bolt = 0.750 inches so the tenon length should be 0.742 - 0.745 inches if you wanted a snug clearance or 0.740 inches if you wanted a bit more, that is without a recoil lug. The Shilen recoil lug that came with that action has...
Chad,
According to Stuart Otteson's book Vol I, on the pre 64 M70's all three guard screws are 1/4 x 32. Later when discussing the post 64 actions, specifically a 1968, he lists the guard screws as 1/4 x 32 also.
Tony
Panda V's Teddy thread spec
The threads on a Panda are 1.0625" diameter x 18TPI with a tenon length of 1.115 inches whereas the Teddy is 1.0625" diameter x 18TPI with a tenon length of 1.340 inches.
Thread spec for a L461 SAKO
The thread spec for a SAKO L461 action is 22mm x 16TPI.
To thread a barrel tenon to fit a L461 action, machine the tenon 21.8mm diameter for a length of 19.4mm and thread at 16TPI x 60° until the action will screw on by hand.
The tenon length of 19.4mm is close...