I have a question for the experts here, since I certainly am not one. Is there any relationship between 'barrel length' and 'accuracy' when comparing AR's? My question has to do with a choice of a 16" vs. a 20" inch barrel vs. a 24". It almost seems to make intrinsic sense that the longer the barrel, the more velocity the bullet will have after it leaves the barrel and that, in theory, all other factors being equal, the more accurate it should be.
However, I have spoken to some that claim that this is an "old" concept because with the improvement in modern-day powder, almost all the powder has been burned after after about 16 inches, and that there really is no significant accuracy difference between a 16 inch barrel and a 20 inch or 24 inch barrel--again, all other factors being equal.
Any expert opinions here?
BJ