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Can I use 2 3/4" loads in an 870 Marine Magnum?

Discussion in 'Shotguns' started by IMtheNRA, May 30, 2005.

  1. IMtheNRA

    IMtheNRA Well-Known Member

    Hello, I was wondering if the common, non-magnum 2 3/4" ammo, such as birdshot, buckshot, and slugs can be reliably used in the 870 Marine Magnum with a 3" chamber. Are there any risks to feeding and ejection, effects on accuracy, or a buildup of plastic in the longer chamber?
  2. A Cleaner

    A Cleaner Well-Known Member

    Yes you can. The chamber measurement is the upper limit of shell size that can fit, not a demand for that specific shell size.

    Chamber 2.75 - 2.75 shells
    Chamber 3.00 - 2.75, 3.00 shells
    Chamber 3.50 - 2.75, 3.00, 3.50 shells
  3. Dave McCracken

    Dave McCracken Moderator In Memoriam

    Yes. AC nailed it. One small thing, though....

    In theory, patterns may not be as efficient when shorter shells are used in a longer chamber. I doubt anyone can quantify it.To quote the Mafia, "Fuggedaboudit"....
  4. Fred Fuller

    Fred Fuller Moderator Emeritus

    Not only can, but SHOULD. The lighter 2.75" loads will handle 95% of what you need to do with a short shotgun if not more, with less drama and cost than the roman candle 3" stuff.

    It's a TWELVE GAUGE after all...


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