Hy, shot in my savage 243 @100yd's. using my reload's, 85gr. sierra's HP's @ 3139 fps. zeroed @ 100yd's. The next thing i did was shoot my Win. factory 100 gr. bullet's @ 2911 fps. they shot 2" higher than the 85 gr. reload's. The question i have is, why do the lighter and faster reload's shoot LOWER, than the heavier and slower factory ammo. This has got me mind boggled. Any info would be appreciated, thank's, Rick.

The barrel of the gun is vibrating at a different point when the bullet leaves it.

quote:

Originally posted by Fjold:
The barrel of the gun is vibrating at a different point when the bullet leaves it.

This is true. You allso have Barrell time to contend with. The slower heavier bullet is in the barell longer in the recoil arc.

The heavey bullets are slower, in the barrel for a longer period of time( recoil barrel rises)gives a higher poi.

Same phenomenon shows up in pistols too. Lower velocity or heavier bullets often impact higher.

So what these guys are saying is that the 100 grainer left the barrel at a slightly more upward angle than the 85 grainer did. That give it a higher arc which resulted in the higer poi. It's not because the slower, heavier 100 grain bullet had a flatter flight path. Not sure of that was clear or not.