Iver Johnson Chamber Length?

snood

April 10, 2012 15:32

I've got an Iver Johnson Champion in 20 gauge. I am trying to determine if the chamber is 2.75" or 3". A spent 3" shell will fit and the barrel close up on the receiver, but it seems tight and won't eject. No serial numbers that I can find or chamber markings. Any info is appreciated. Thanks

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  charliemeyer007

  April 10, 2012 17:01

  I would doubt that it was made for 3 inch. IJ were not top shelf, just shoot 2 3/4 and have a gun that eject/extracts.

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  Ned Fall

  April 11, 2012 08:58

  A 2 3/4 inch chamber will allow a 3 inch shell to be inserted due to the forcing cone at the rear of the bore or the front of the chamber (your choice of terms). Be safe, just load 2 3/4.

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  perry shooter

  April 11, 2012 10:30

  If you look mat a modern shot-gun shell you will see that the shot is covered with folded over when the shell is fired this unfolds and has to have room to open all the way up to let the shot and wad travel up the barrel if you shoot a 3 inch shell in a 2& 3/4 inch chamber the unfired shell will chamber but then when the shot cover tries to unfold it jams into the barrel that is smaller then the chamber this causes dangerous higher pressure in your shot gun and make shell hard to get out of the chamber PLUS your shot pattern may suck.

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