He can have it. I am more interested in that test if I can read the full procedure and see photos. I would like to see what a 2.5 inch plate at 70 degrees looks like when holed by that 12.2 cm projectile.That's Lorrin's wheelhouse. I'm not going to take up his mantle. But, try to find the 100mm APBC the AARMC did june 1972.
BTW, they both are not perforation i.e. NBL but Army BL.
But, to further my point regarding the M62 projectile from the US M1A1 76mm gun at higher slopes, I believe its cap shape is very bad also. Compare to a Pzgr 39 for example.