|
The stylized PM and HACo in a square over NP began to appear on the barrel flats about 1922, and all barrels underwent proof testing at the Hunter Arms factory.
Barrel flats of a 3" chamber .410 Specialty Grade
Close up of Proofmark
LTC Calvin Goddard writing in Army Ordnance in 1934, stated that Hunter Arms proof tested 12ga 2 3/4" chamber barrels at 14,300 psi.
PLEASE NOTE - The Proof Pressure is approximately ONE AND ONE-HALF times the intended Service ( or Using ) Pressure.
L.C. Smith hang tags after about 1920 indicated the standard 12 gauge load was for 3 Dram Eq. with 1 1/8 oz. shot. Modern Winchester 1 1/8 oz. 3 Dram Trap loads have been measured at 1,200 fps with a pressure of 9,600 psi.
For more information regarding appropriate loads for your L.C. Smith.
|
