Weight per unit of volume
Despite of rather high content of potassium nitrate, powder N 310 is among the least dense modern "smokeless" powders. One Cubic Centimeter (1.0 CC) of factory-fresh powder weighs just 0.50 grams or 7.7 grains; scooped with Lee Powder Measure Kit dipper along with directions and some years of experience.
Users of Powder Measure Kit may still find a column for ALCAN AL-120 powder from "slide rule" of that kit. Column is the last one at right on the side of quickly burning powders in a slide with a text "Copyright 1982". One Cubic Centimeter of AL-120 weighs the same 7.7 grains or ½ grams, just as N 310. According to hearsay it WAS Finnish N 310, but -- please -- NEVER trust on hearsay, gossips and other unconfirmed data, when developing handloads !!