I have been experimenting with this & a similar load and know it well. Ford supplied the following from the 1940 Shooter's Bible:

>>For 8x58R, they show 2 grams of R.5 with the 12.7gram bullet also for 530 m/s at 25 meters (1600 kg./cm2). It shows 2.1 grams W1920 powder with 10 gram bullet for 624 m/s at 25meters( 2000 kg./cm2).<<

And I can tell you empirically that VV N140 closely mimics R.5(Rottweil). I don't know if one can assume the >>13<< grams(200 grain) metal jacket bullet is an abbreviated 12.7 grammes?


There's much more of course.

Cheers,

Raimey
rse