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Browning Invector or Plus choke tubes?

PA Shootist
Just trying to determine the difference (thread dimensions & pitch, overall length, etc) of the Browning Invector choke tubes versus the Browning Invector Plus choke tubes. The shotgun is a Citori Featherweight 12 gauge. Looking for flush to muzzle tubes, don't know what to order, parts listings have me confused. I have seen Invextor Plus that project past the muzzle, probably for Sporting Clays type quick changes; I don't want that type. Any help appreciated.
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Comments

7 comments

Date Votes
  • tocamoha
    Call Carlson's 785-626-3700
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  • Tailgunner1954
    Unless the gun is marked for Invector+ tubes, it takes the "standard" ones. IV+ tubes ONLY fit factory "back bored" barrels.

    As a FYI, the IV tubes are about 1 1/2"-1 3/4" long, while the IV+ tubes are about 2 1/4 long.

    PA
    My error, it's been a while since my wife sold her Browning w/standard tubes.
    Anyway, I did dig out one of my 12ga + tubes (all mine are flush to the muzzle) and my caliper to get the following
    OAL 2.376"
    Smooth section .827" diameter
    Thread section .822" diameter
    Lead-in section .788" diameter
    Length of smooth section 1.581"
    Length of thread section .611"
    Length of lead-in .172"

    I don't have a pitch gauge here, but it looks like (eyeball to caliper tip to thread) like .025" between pitches or 40TPI
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  • PA Shootist
    I was really hoping to find out actual thread diameter and pitch dimensions for each so I can measure shotgun bore's threads. I can't find where marked for either Invector or Invector Plus. I understand the Invector Plus fits backbored (oversized bore) tubes, Invector for the older standard Invector. I have never seen any Browning choke tubes with threads at the muzzle end; are you sure of that?
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  • charliemeyer007
    Perhaps ask them.
    http://www.browningshop.com/product_list.do?q=choketubes&promoCode=BNGPAYPCWEBMACSS&kwid=a8b1539bdf104787a8d02e1b830c4e8e
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  • PA Shootist
    Well, I am zeroing in on what I want to find out, still no dimensions on the Browning site referenced, but the photos show Invector tubes as shorter than Invector Plus. That clue was previously given, but it was said the threads were at the muzzle end of the choke tube. That had me wondering. It appears I want standard Invector, with shorter length, and the threads at the back end of the choke tube. I do appreciate the help! Thanks, gentlemen!
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  • MIKE WISKEY
    note; the 'invector' (standard), winchester 'winchoke' and mossberg 'accu choke' are all the same and interchange.
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  • XP100
    Invector tubes are the same as Ithaca(later) H&R, Winchchester, Mossberg 500, T/C and several others. Go to choketube.com which is Carlsons web site. They have an interchange chart.
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