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How to watch for overpressure in shotshells?

Discussion in 'The Ammo & Reloading Forum' started by JohnK3, Mar 22, 2004.

  1. JohnK3

    JohnK3 New Member

    Joined:
    May 5, 2003
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    1,636
    Just getting back into shotgun shooting. I've got my dad's old MEC 600 Jr. (70's era) in 20ga. and looking to buy a Mk. V in 12ga. soon.

    Other than the obvious (primer backouts/flattening/etc.) how does one watch for signs of overpressure in a shotshell?
  2. inplanotx

    inplanotx New Member

    Joined:
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    Texas
    JohnK3, boy, now you are dating me as an old phart. I still have, and use, my MEC 600 jr press to this day. I have loaded many, many thousands of 12 ga shotshells on it and have finally wore out my sizing die. I called Mayville Engineering about two weeks ago and they are sending me a new sizer die. I love that old machine and will not let it go. I have every powder and charging bushing ever made for that old timer.

    As for overpressure, the only other thing I can think of is DO NOT DEVIATE from the load book data and parts used. I have always used Winchester AA hulls and have never had a problem. I did have one shell I did not drop a powder charge into and that was the only mistake I ever made. One shell out of literally thousands.
    Went tinkle, tinkle tinkle, down the barrel. No harm done. Made sure barrel was not obstructed, racked in a new round and away I went. Haven't ever had another one!

    Try the 600 jr. It's a lot of fun. I have the auto primer feed for mine. A must in my consideration!
  3. Marlin

    Marlin *TFF Admin Staff Chief Counselor*

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    At SouthernMoss' side forever!
    I used a 600 Junior for years, IPT, and gave it to # 1 son a while back. I really did love that little machine and was very comfortable using it.
  4. inplanotx

    inplanotx New Member

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    Texas
    Marlin, had mine for 28 years and it still works. Would never give it up. Mayville Engineering charged me $6.00 plus shipping for a new sizer die and all is well again. May not be the fastest thing around, but it makes good shotshells.
    Last edited: Mar 22, 2004
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