Chamber pressures for 12 Gauge VH

[J.B. Books]

Originally Posted by Bruce Day

I have been unable to identify any differences between turn of the century guns and late 1920's guns that suggest that earlier guns were intended for less pressure.

I have observed one difference in the earlier guns, thinner wrists. Most likely beefed up to handle greater recoil of heavier loads rather than greater pressure.

[Drew Hause]

Per Tom Armbrust:

3 Dr. Eq. 1 1/8 oz.
Winchester Trap Load
1,202 fps 9,600 psi

AA Xtra-Lite 1 oz WAAL12
1189 fps 8000 psi

AA 'Low noise Low recoil' 15/16 oz
980 fps 6,200 psi