http://www.24hourcampfire.com/chronograph.htmlFrom the velocity that my Oehler 35P records for the middle charge (2,649 ft/sec), I subtract 1/12 of the fourth difference � 1/12 of -26 ft/sec equals -2.2 ft/sec, and subtracting this negative figure is the same as adding it as a positive figure, so 2,649 ft/sec plus 2.2 ft/sec equals 2,651.2 ft/sec.
Anybody understand why he is using 1/12? That is the only part I can't wrap my head around.
