Low Velocity - High, High Velocity - Low ???

Discussion in 'Handloading and Reloading' started by Zerstoerer, Jul 24, 2006.

Thread Status:
Not open for further replies.
  1. Zerstoerer

    Zerstoerer Member

    Dec 5, 2005
    Desert Southwest
    I don't understand:
    A factory round leaves the barrel at 2650 fps and hits 2 inches low at 100yards.
    My handloads leave the barrel at 2500 fps and hit 3 inches high.

    Both .303 British, 150 gr. SP Bullets out of an scoped Enfield No.4 Mark II.

    What am I missing here - should it not be the other way around with the lower velocity hitting the target lower ?
  2. ChristopherG

    ChristopherG Member

    Jan 7, 2003
    Central WA
    This kind of thing can be perplexing. A slower bullet spends a slightly longer time in the barrel, right? And what's the barrel doing while the bullet is in there? Recoiling, including rising upwards. So a slower bullet stays in the barrel until the muzzle is actually pointing higher before it releases--and the direction the barrrel is pointing at the moment the bullet exits determines its trajectory.

    Internal ballistics, it's called--the stuff that happens before the bullet even leaves the barrel.
  3. BluesBear

    BluesBear member

    Jul 25, 2003
    The Great Pacific NorthWet
    Handgun shooters have had to deal with this for years.

    When 125gr 38 & .357 loads became all the rage everyone was suddenly finding their old fixed sight revolvers were shooting LOW with the higher velocity ammo.

    ChristopherG explained it pretty well.
Thread Status:
Not open for further replies.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice