Interesting, but questions & quality as noted above need to be addressed.
Considering the groove depth of those Martinis is all over the charts makes me wonder what the lead alloy they used, happens to be.
A softer bullet will slug up, but not one of normal alloys made for the market by commercial companies - normally.

The ballistics of the posted round will about match what a 2.4" or 2.6" Straight Case Sharps round will do with GOEX powder. Of course, the 2 7/8" and longer Sharps cases will exceed this one with GOEX powder and add about another 100fps with T-7 over GOEX.
The longer cases should run about 1,550 to 1,650fps with the same bullet.