Lagopus,
I found an article in DGJ (Spring 1996--Vol Seven Issue 1) written by Douglas Tate on 2" guns. He says the Birmingham gun trade petitioned the Birmingham proof house in 1935 requesting to lower the pressure proof for the 2" gun and not use the 2 1/2" service pressure proof. Both proof houses reviewed the petition, but it was denied. It wasn't until 1954 when the rules of proof were revised. The agreed to proof for a 2" gun was 2 3/4 tons per square inch.
I have a 2" gun proofed at 1 oz built in 1937.
Ken
Last edited by KDGJ; 01/31/17 09:27 PM.
