Posted On: 10/19/11
By: Amanda Hepworth
A: Those grain numbers refer to bullet weight. There are 7000 grains in a pound, so a 147 grain bullet weighs about 1/3 of an ounce. The advantage of this 147gr FMJ ammunition is that it recoils exactly like 147gr hollowpoints, while 115gr ammo might have a slightly different recoil impulse. Also, this heavier bullet is traveling slower. It is actually traveling under the speed of sound, while almost all 115s are traveling above the speed of sound. For most people, this doesn't matter, but if you ever use a sound suppressor (silencer), the lack of the sonic "crack" will make the ammo much quieter.
Posted On: 10/5/11
A: Yes, 147gr 9mm ammunition is sufficient for self defense. It would be recommended to use a jacketed hollow point for that purpose, wherever legal. Because of the projectile's design, 9mm full metal jacket ammunition of all bullet weights will perform in an almost identical manner against soft targets.
Posted On: 9/27/11
A: From a 4" barrel, this Federal 9mm ammunition should chronograph at approximately 950fps. This may vary depending on your firearm.