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is there a difference between 20 gauge chokes?

Discussion in 'Shooting Related Threads' started by g7777777, Oct 10, 2009.

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  1. g7777777

    g7777777 TS Supporters TS Supporters

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    20 gauge- invector v. invector plus? other than length? does anyone have both that can compare?

    12 gauge are totally different but looking at the 20 guage ones in a store- they look like other than length they are the same?

    regards from Iowa

    Gene
     
  2. shrek

    shrek Active Member

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    Hi Gene;

    According to the specs the plain invector barrels are supposed to be .620 bore and the invector plus are supposed to be .630 bore, and as such the chokes should be in accordance with the bore they are measured.

    Also I have noticed that different companies have much different amounts of contriction per designated choke name in 20 gauge than what I have seen with 12 gauge.
     
  3. short shucker

    short shucker TS Member

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    shrek,

    That's because it is a percentage based on bore diameter.

    ss
     
  4. Pull & Mark

    Pull & Mark Well-Known Member

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    Gene, shrek is correct about the overbored barrels having the invector plus chokes over the 20 ga. standard invector barrels from browning. I'm not sure about all the differences in the chokes themselves he was referring too. From what I have heard, (not seen) They are threaded differently so that you can not install the plus in the standard and visa versa. Break-em all. Jeff
     
  5. shrek

    shrek Active Member

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    What I am referring to regarding differences in choke constrictions is that some aftermarket companies make their 20 guage chokes in the same .005 increments as their 12 guage choke tubes and others make them in .003 and or .004 increments.

    In other words they vary a lot more from maker to maker than 12 gauge ones seem to between makers.

    Ultimately it is what the pattern board tells us.
     
  6. rodbuster

    rodbuster TS Member

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    This was a good question, and a good answer. Thank you gentlemen for this info. I have a 20 gauge Citori that is invector plus choked. I have wondered about the differance in the 20 gauge choke tubes. Not to be off topic, but what brand choke tubes would you gentlemen recommend for my Citori?

    Have a good evening, Rodbuster.
     
  7. Bob_K

    Bob_K Well-Known Member

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    Afton, Virginia
    20 Gauge Invector Plus Dimensions:

    Full - .602
    IM - .606
    M - .617
    IC - .621
    Sk - .624
    Cy - .627
    Bore - .630


    20 Gauge Invector Diminsions:

    Full - .594
    M - .605
    IC - .609
    Sk - .612
    Cy - .615
    Bore - .617
     
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