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870 Step Rib Barrel

Discussion in 'Shooting Related Threads' started by archangel, Mar 5, 2013.

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  1. archangel

    archangel Member

    Joined:
    Jul 14, 2010
    Messages:
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    My sons 870 has one of the older step ribbed target barrels. We found it used about 4 years ago and it came with an extra long handicape and an IC choke. am I right that for this barrel a modified rem choke equals full. mike
     
  2. Gapper

    Gapper TS Member

    Joined:
    Feb 26, 2010
    Messages:
    823
    Some of the old barrels were "backbored" from the factory, though the backbore ended before the area where the choke tube begins.

    What constriction you'd end up with is a moot point; performance is what counts and the step in the bore did not quite act like an additional amount of choke.

    I used a regular modified choke tube in mine (backbore, step-bore 870TC), Carlson's brand, with good performance from 16 yards on back.


    If you're getting indifferent performance, check it on a pattern plate to give some idea of how much choke you're actually getting.

    Regards, GAP
     
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