Help! Question about guns!

[kandrathe]

There's more to the damage than just the size of the round in question.

Yes. You hit the bullseye! :-)

The mm or diameter is one factor in the ratio. But, essentially the physics entails the F=MV relationship. A heavier grain bullet at the same diameter and velocity will deliver more damage potential (and also range). The fragmentation of the bullet will also increase damage potential.



Consider the variations above in 9mm ammo and lethality.

Also, for popular rifle ammo...



223 -- 30/30 -- 308


Off hand -- other things to think about would be rifling versus smooth bore (e.g. Magnus Effect * ), and fouling of the barrel. Guns are seldom in the ideal condition for firing, and once in action, the accuracy deteriorates quickly due to use in both heat and debris.

But, it all depends on the gun. Generally, I'll shoot about a dozen or two rounds between light cleanings. Most of my guns shoot best when the barrel is clean or lightly fouled (5-10 rounds or so). Every gun is a little different though.

* Not to be confused with the Katzenburger Uncertainty Principle -- which is... "If you sealed me and a cat in a box, would I outlive the cat?"