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Wad Pressure

Discussion in 'Shooting Related Threads' started by AveragEd, Mar 24, 2010.

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  1. AveragEd

    AveragEd Well-Known Member

    Joined:
    Jan 29, 1998
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    Location:
    Mechanicsburg, Pennsylvania
    Squibb, I think this might be one of the hottest shotshell reloading topics right now. It's true that you do not need wad pressure with today's reloading components and that comes directly from the makers of some of those components. Downrange Wads will tell you that less wad pressure is better and the zero is perfect.

    A lot of people believe that the powder has to be held firmly against the primer for sure and complete ignition. If you've ever reloaded handgun ammo like .38 Specials for target shooting, you know that there is less than five grains of powder in the casing and there is a LOT of empty space between the powder and the base of the bullet. When the shell is held horizontally as when being fired, the powder is below the primer's flash hole, yet those shells shoot just fine. And shotgun powders and handgun powders have very similar burning rates - in fact, Clays has become a very popular handgun powder.

    I will add the caveat that Winchester is recommending some wad pressure be used with their two-piece AA hulls, but that is only due to the interior design of that hull.

    Ed
     
  2. JerryP

    JerryP Active Member

    Joined:
    Jan 29, 1998
    Messages:
    1,753
    rev, Wad pressure is applied by the crimp. Any pressure applied before the crimp results in " the plastic wad just slips back up". A properly loaded shell will automatically result in the correct amount of wad pressure.

    Ed, if you have ever fired a primer in an empty casing, in the dark, you know an amazing amount of flame results. The powder can't hide.
     
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