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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

    Jul 14, 2010
    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

    Feb 26, 2010
    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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