I have an old Parker Hale in 270 that I'm considering re-barreling. It's in original condition. Can anyone tell me the thread they used on these barrels?
Could be a wide range, often based on the M98 actions - which themselves have a wide range, so it could be (Tenon length x diameter x pitch x thread form)
M1938 - 0.650 x 0.980 x 11 1/2 x 55 (Whitworth) - FRR 1.41x1.81
M1938 - 0.634 x 0.985 x 12 x 55 (Whitworth) - FRR 1.412 x 1.78
M43 - 0.620 x 1.104 x 12 x 55 (Whitworth) - FRR 1.4 x 1.7
M48A - 0.680 x 1.100 x 12 x 55 (Whitworth) - FRR 1.41 x 1.6
VZ-24 - 0.635 x 1.100 x 12 x 55 (Whitworth) - FRR 1.4 x 1.695
But as indicated if you measure up the FRR that should be a good guide to the thread/tenon form before you actually pull the barrel off
PH are very unlikely to be based on the VZ (although they tend to be better actions to take the higher pressures) - we have seen PH using M48, 43 and 1938 actions, but not M1903, 90 or 93 - which are different again - generally 0.650 x 0.980 x 12
Julie