You are correct Jon that Great Britain continued using LUP to measure BAR until 1989.
650 BAR by LUP + 10 - 14% to convert to transducer BAR
650 X .14 = 91; 650 + 90 = 740
740 BAR (by transducers) = 10,733 psi
“Eley Shooter's Diary 2005” stated “The later transducer system uplifts the (PSI by LUP) values by approx. 14%.”
I assume Eley did simultaneous lead crusher and piezo transducer measurements since there is no formula for converting crusher numbers to transducer numbers?
Bro. Larry's conversation with the Birmingham Proof House in 2001 confirmed that they converted Tons to psi simply by Tons x 2240 x 1.33
