How long is too long?

[bandit86]

That makes sense with the bigger calibres since they're chambered in many rifles. Not so much for the smaller stuff I would imagine. !8" is probably the outer range for 9mm acceleration. I was probably a tad off on my 12" estimate. (that's what SHE said!) Ha! beat everyone to it.

9 mm peters out at 12 inches, very minimal acceleration on light bullet some deceleration on fast bullets

 

[dan belisle]

Mechanically speaking, in a handgun, there will be no accuracy OR friction issues at all. Longer sight radius is more accurate for SOME people, a lot depends on how old you are and your eyes. As you age the distance that your eyes will easily focus changes, making some front sights on different barrel lengths impossible to see. While you eyes are still flexible, a longer sight radius will GENERALLY give better results . - dan