Author: britrifles
Subject: Reloading for the 7.62x51mm Enfields, or...
Posted: April 08 2020 at 6:36pm
Subject: Reloading for the 7.62x51mm Enfields, or...
Posted: April 08 2020 at 6:36pm
 Shamu wrote:It isn't "tons" in the usual sense of the word. I believe it comes from a table converting copper pill crusher tests from a "pressure figure" in CUP. Pre-metrication British chamber pressures are: 1. Based on the long ton of 2240 lbs, 2, Measured with an axial crusher gauge with element in a modified bolt head, not a radial gauge with hole in barrel. These combine for lower numerical readings than US radial crusher gun CUP and lots lower than piezo psi. |
It wasn’t the maximum cartridge pressure of 45,000 CUP measured the same way? I.e copper crusher method.
Proof Pressure to 18.5 tons per sq in = 18.5 x 2240 = 41,440 CUP, no where near what the Mk 7 cartridge is rated for. It should be much higher.
Doesn’t add up, what am I missing?