Heres something else I dont know...

A grain as used here is a unit of mass. There are 7000 grains in one pound or 437.5 in one ounce. Other things equal and within certain limits, a particular powder charge in a cartridge will drive a lighter bulled to a higher muzzle velocity. Once it leaves the barrel, a bullet's ability to resist wind drift and maintain its velocity against the force of air resistance depends on its shape, velocity and sectional density. Sectional density is the mass of the projectile divided by its cross sectional area of the bullet. Thus, while a heaver bullet will generally leave the muzzle at a lower velocity, it will maintain its velocity better than a lighter bullet.

Ken
 
A grain as used here is a unit of mass. There are 7000 grains in one pound or 437.5 in one ounce. Other things equal and within certain limits, a particular powder charge in a cartridge will drive a lighter bulled to a higher muzzle velocity. Once it leaves the barrel, a bullet's ability to resist wind drift and maintain its velocity against the force of air resistance depends on its shape, velocity and sectional density. Sectional density is the mass of the projectile divided by its cross sectional area of the bullet. Thus, while a heaver bullet will generally leave the muzzle at a lower velocity, it will maintain its velocity better than a lighter bullet.

Ken

Thats kinda what I thought. Thanks for the explanation!

Matt
 
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