Bullet Velocity - Semi Auto vs Bolt / Lever

arizona jim

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Just wondering what you all thought.

I was just thinking about downrange bullet performance ( velocity, energy, trajectory ). If you have two same caliber rifles and are firing the same ammo, ...... with the only difference being one is semi auto & the other is.... say a bolt or a lever, ........... will the bullet performance be the same ?

I was thinking that the gasses used to cycle the action in the semi-auto might take away from the pressures used to push the bullet down the barrel faster. It may not be a significant difference, but maybe enough to change the effective range of the round.

What do you all think ?
 

larrysogla

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Maybe 20 to 30 FPS slower in the gas operated auto, but you will be surprised, sometimes it comes out faster in the gas operated auto. It all really depends on the tightness of the chamber, leade(distance the bullet will initially travel before contact with the rifling), bore tightness, taper of bore from chamber to muzzle and width of rifling lands & grooves. That being said, no animal will know the difference when whacked by a bullet at 3,000 FPS vs. 3,020 FPS. The difference in long range trajectory(300-400 yds.) is also smaller than the accuracy your hunting rifle is capable of. SSSSOOOOO, nobody worries about it who is carrying a hunting rifle. Adequate accuracy for the range you will be firing at & appropriate bullet construction is more important than 20 FPS differences. 'Nuff said.
larrysogla.
 

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