Have loads made up for the Nagant
Sierra #2145 165gr Spitzer
Powder is H414 Hodgon
Brass: Lapua

Ballistics 2600 FPS 2522 ft lbs
Purchased ammo on Shelf
7.62x54r Silver Bear 174 gr
7.62x54r Brown Bear 203 gr

Lead on Shelf
Sierra .311 dia Spitzer 125 gr
Speer 7.62 .310 Spitzer 123 gr
Speer .308 dia 125gr TNT HP

Have not done anything stuoid yet like firing the weapon without checking in first to see what is what. Sounds like the stuff you are talking about is:

Sierra #2190 150gr hpbt match king
powder imr 4350 55.1 grains 2600 fps 2327 ft lbs

Thank you
George P.