OP, you are going to get a lot of cheeky answers in this thread because there are never-ending caliber wars, best exemplified by the old saying, ".45 -- because it's silly to have to shoot twice."I know this is a bit of a loaded question, but which is the better self-defense round? 9 mm or .40 S&W??
I agree with this^^^ I'm no expert by any means, but I don't believe in the term "stopping power" I think its total BS. These are handguns, which have low velocity so basically they are hole punchers. I have seen deer run over 100 yds with a well placed round from a rifle with a lot more velocity than any handgun. I will leave out the 22 caliber, but the rest are just personal preference. 9MM are cheaper.OP, you are going to get a lot of cheeky answers in this thread because there are never-ending caliber wars, best exemplified by the old saying, ".45 -- because it's silly to have to shoot twice."
For me, it's not a question of caliber. Caliber is not, in my opinion, the most important factor, remembering that we use our firearm to "stop the threat."
The critical factors involved in stopping the threat are:
Shot placement infers control, sight alignment, sight picture, trigger control, etc. Hitting center mass multiple times is an important factor in stopping the threat.
- Shot placement
- Type of bullet
Bullet type equals choice of bullet; FMJ, JHP, etc. A JHP that expands and creates a significant internal wound cavity lessens the bleed-out time that results in unconsciousness or incapacitation, and reduces the possibility of rounds going through the target and striking unintended targets.
The FBI standardized on .40 using Speer Gold Dot JHP cartridges for quite a few years. Recently, the FBI decided to use 9mm cartridges, but I do not know if they stayed with the Speer Gold Dots or some other, perhaps newer, bullet design.
The cost involved in practicing to become proficient can be mitigated by using FMJ cartridges rather than the more expensive JHPs. Some ammunition manufacturers produce "paired" cartridges in FMJ and JHP that have similar or identical bullet grain weights and powder loads so there is little if any difference in the felt recoil for a given firearm.
The bottom line is, all rounds/calibers are deadly. Your proficiency with the firearm you decide to carry and the ammo type you use will determine how well you can stop the threat.