Slower bullets shooting higher

[Hitzy]

Heavier bullets shoot higher point of aim then lighter bullets...not 7gr difference bullets, but significant weight difference.
Slower heavier bullets have more dwell time in the barrel and the recoil raises the muzzle just enough they shoot higher.

 

[WhelanLad]

doesnt it depend on weather you are sighted for slow Heavies... or Sighted for lighter Fastys??

if im Zero with a Heavy at 100.... sure the lighter will be higher?

?
in my experience with that kimber, vertically sweet in a string - 160gr hits zero... the 154 hits a little higher... and the 140gr hits higher again.

i use the same "zero" but different numbers on dial fro different loads

 

[Big Bad]

I think it is safe to say that firearm ballistics is a complicated issue dependant among other things on calibre, individual barrel type, powder charge, bullet weight, air pressure, relative humidity and air movement, and not forgetting the rotation of the earth. The science of it will take you far but if you're putting a lot of investment into accuracy, test firing and sighting in with the actual rounds you're going to be using is required.

 

[pjs]

Eyeball a few revolvers and notice how high the front sight is. It would appear that the gun should shoot low. This is to compensate for recoil/barrel time of the bullet.

 

[351 power]

Yes true, but since the rifle becomes very dynamic when the shot is being fired the bore and direction of aim can change before the bullet leaves the barrel. So the bullet could rise above the initial bore direction. Won't raise above the direction/aim at the time of the bullet leaving the muzzle.
edi

This is an interesting discussion. I understand that the bullet starts to drop once it leaves the barrel. I can also see the idea of recoil affecting bullet path. But the variable I'm thinking about is the fact that whatever sight you use to direct the bullet is directing the barrel first. So the bullet trajectory can appear to rise because the sighting apparatus, scope or irons, is what we use to find and ultimately predict bullet travel, not just the barrel. Perhaps an unsighted barrel is the only way to determine if it's a velocity or a recoil issue. And are velocity and recoil actually separate concerns?

 

[porpoise]

Heavier bullets shoot higher point of aim then lighter bullets...not 7gr difference bullets, but significant weight difference.
Slower heavier bullets have more dwell time in the barrel and the recoil raises the muzzle just enough they shoot higher.

That theory makes total sense. Now try it out and get back to us