New Army "Caliber Configuration Study"

[stanc]

PKM averages about 2700fps with 147.8gr 7.62x54R light ball steel core USSR 1986. G1 BC is .325

I presume you got that info from http://7.62x54r.net/MosinID/MosinAmmo001.htm

The problem is, http://7.62x54r.net/MosinID/MosinAmmo.htm shows the BC of steel-core, light ball varying from an incredibly low 0.242 to an unbelievably high 0.538, depending on where and when produced.

And to add to the confusion, I found this info on THR:

148-gr steel-core ball, 57-N-323-S: 0.381 G1 --- 0.192 G7 --- 820-835 m/s http://www.thehighroad.org/archive/index...19407.html