Standard sample size is .4oz. 0.4oz is about 1/3 cup of powder
At 8 grains per 400 rounds, this will go a long way! 0.4oz = 170 grains = Enough powder for about 8000 rounds.
hBN, 98% Pure, APS: 0.5 micron
These are typically applied by tumbling/impact media. Either steel or ceramic is fine. Just as long as it is clean media and your bullets are free from oil prior to applying. EXCELLENT SUBSTITUTE FOR MOLY OR WS2