What does "grain" mean/measure in regard to ammunition?
exampe "55-Grain FMJ", I know what FMJ is.
Bound's hubby here:
A grain is a very precise unit of measurement. a grain is 1/7000th of a pound ... 7000 grains to a pound.
In rifle and pistol ammunition, the bullet weight is expressed in grains, as is the powder charge. For example, a typical .308 Winchester target round would be a 168 grain Sierra MatchKing loaded on top of 41.5 grains of Accurate Arms 2520 powder. Source(s): Master class competitive rifleman ...
Expert class competitive pistol shot ...
Reloader with over 124,000 rounds loaded ...
All with over 30+ years experience!
the weight of the bullet itself.
A grain is a unit measure of weight. There are 7000 grains to 1 pound or roughly 15.5 grains per gram.
A 55 grain bullet is about 0.13 ounces or 3.6 grams.
Grains refer to two things in a round of ammunition. The bullet weight is expressed in grains and the weight of the power charge is expressed in grains (except in shotguns which I believe is expressed in fractions of an ounce). If you do not reload, you have no reason to worry about the weight of the powder charge, only the weight of the bullet.
The weight of the bullet.
THE GRAIN IS A UNIT OF MEASURE USED FOR BOTH POWDER AND PROJECTILE
A 55 GRAIN BULLET BEING SMALL AND USED IF FOR EXAMPLE 22-250 CAL OR A .223 CAL AS OPPOSED TO SAY A 180 OR 200 GRAIN BULLET USED IN SOMETHING LIKE A 300 MAGNUM
THE LARGER THE GRAIN WEIGHT THE LARGER THE PROJECTILE
LIKEWISE WHEN RELAODING AMMO THE MORE GRAIN WEIGHT USED MEANS THE MORE POWDER VOLUME OF THE SAME TYPE OF POWDER
grain is the actual amount of gun powder used
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