Originally Posted by
rigpiggy
1 pound =7000 gr ergo 1oz is 437.5 gr Easy ke formula is (V*V)*min grains/450240) so your above 1oz shotgun slug at 1600 fps is about 2487 fpe And that is quite a stiff load not 80,000
I forgot that one pound
force is the force exerted by a mass of one pound
under gravity of one foot per second^2, not earth gravity of 32 feet per second^2.
Divide my figures by 32. 80,000/32 = 2500
and for the gun 500/32 = 15.6
Not used to grains, or even pounds force, but yes, essentially I agree with you now.
Amusingly the energy of the bullet is also about five horse power seconds. If you have a horse working hard for five seconds to create kinetic energy in a small projectile and apply it to you, it's going to do some damage.