Generally they don't. Lighter bullets generally have a worse ballistic coefficient as compared to heavier bullets of the same caliber.
noo
Many things can be smaller than a rock, such as a pebble, a grain of sand, or even a speck of dust.
Id say a milligram of salt equals a milligram. A grain of salt is rediculously small, way smaller than a milligram, about 100 Micrograms
It depends on how thick the Kevlar vest is.
An avoirdupois ounce is equal to 437.5 grains, while an international troy ounce is equal to 480 grains. It is based upon the mass of a single grain of cereal.
Check here: http://www.gunsandammomag.com/ammunition/number_072605/index2.html
This means the weight of the bullet itself. A common misunderstanding is that the higher the grain the better. Which is not true. A larger grain is slower than a smaller grain. Find which grain of bullet shoots the most accurate out of your gun. There are 7,000 grains to a pound.
Winchester lists the ballistics of the ammunition it sells.
The .223 Winchester Super Short Magnum (W.S.S.M.) is a hyper velocity rifle Êround designed in 2002 for medium to large game hunting. There are three standard grain loads.ÊThe ballistic performance for the 40 grain bullet is 4,352 ft/s, for the 60 grain it's 3,733 ft/s, and the 75 grain is 3,378 ft/s.
A grain is a weight. Smaller than an ounce or a gram- its a tiny amount. When talking about guns, grains refers to how much gunpowder is in each bullet. A bullet with more grains of gunpowder has more bang to it than a bullet with less grains of gun powder.
Look here for the info http://www.rifleshootermag.com/ballistics/308_winchester.html
Grain refers to the weight of the bullet when measured on a powder scale.
The weight of the bullet. They can range from 25 grain (Small rifles) to over 400 grain for big game.
Grains refer to the bullets weight. A 40 grain bullet weighs four grains more than a 36 grain bullet. It's a little heavier, that's all.
Grain refers to the weight of the bullet when measured on a powder scale.
The reference to grains means the weight of the bullet.
The velocity for a 140 grain bullet is 3100 fps.at the muzzle,2996 at 50 yards,2894 at 100 yards,at 500 yards it's 2156.The foot pounds are 2988 ft/lbs. at the muzzle,2605 ft/lbs at 50 yards,2410 ft/lbs. at 100 yards and at 500 yards it's 1445 ft/lbs.