Huh? You really should know this.
http://en.wikipedia.org/wiki/Muzzle_velocity
Barrel length can affect the kinetic energy transmitted to the bullet.
Thankyou for the wikipedia page. I never knew what muzzle velocity was until you linked a wiki page for me.
Ask a stupid question, get a stupid answer.
Love it when people try to act smart by being condescending.. Yeah, I'm sure you know much more than the people writing the articles on Wikipedia, you just don't want anyone to know that by asking questions even an idiot wouldn't. Clever move.
What would do more damage, a faster bullet or a slower bullet?
Aram asked why a .223 pistol would do more damage than a .223 rifle, and you posted about muzzle_velocity. Which would make me think you feel that a slower bullet would do more damage, since the .223 pistol would undoubtedly have a slower muzzle velocity. Is this the case? If so, why?
My ignorant assumption would be that a faster bullet would do more damage as it'd have more velocity, and therefore more momentum (p=mv). So, my question is still the same as Aram's...why would a .2239 pistol do more damage than a .223 rifle?
Especially since the context of Aram's post was in response to poo-guy talking about how damage is related to mass and velocity (i.e. momentum). Personally I found your linking to muzzle velocity to be a pretty poor answer, as it wasn't particularly an answer, especially in context of Aram's post.
If damage is a function of mass and velocity, then damage is related to momentum. In what way? Simply stating that muzzle velocity explains a faster moving bullet doesn't answer Aram's question. Is it simply more momentum = more damage? Because I'd imagine a bullet that is 1g going 10,000 m/s would not necessarily do as much damage as a bullet that was 100g moving at 100 m/s (I picked extreme values for a reason).