F means fine the more Fs the finer the Grain. Yes G= Grain Also Grain the weight of a grain of wheat' 7000= 1 lb, a grain of wheat was smaller 300 years ago black powder Grain is a measure of volume. Smokeless Grain is a measure of weight.
XD9 service, Dark Earth
"This year will go down in history. For the first time, a civilized nation has full gun registration. Our streets will be safer, our police more efficient, and the world will follow our lead into the future!" -Adolf Hitler,1935" Th