Full choke for ducks and geese

Discussion in 'Shooting - Reloading Forum' started by Sunklands, Oct 4, 2017.

  1. duckman54

    duckman54 Senior Refuge Member

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  2. Sunklands

    Sunklands Senior Refuge Member

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  3. 10GAGENUT

    10GAGENUT Elite Refuge Member Flyway Manager

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    Wad Wizard made that I'll bet.
     
  4. Sunklands

    Sunklands Senior Refuge Member

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    Maybe some pics, down the bore of that choke are needed.
     
  5. Joe Hunter

    Joe Hunter Senior Refuge Member

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    Since that is for a 20ga Invector Plus barrel, and I believe the 20ga Inv-Plus bore diameter is suppose to be about .630", and if that's the chokes constriction (.615"), it amounts to about .015" constriction, a typical (depending on who you ask) modified choke constriction.
     
  6. theduckguru

    theduckguru Elite Refuge Member

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    If all your bird hunting requires a full choke, you aren’t doing it right.
     
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  7. 10GAGENUT

    10GAGENUT Elite Refuge Member Flyway Manager

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    Never once in this conversation was it mentioned this was an Invector Plus choke tube which does change things from a standard 20 gauge bore.
     
  8. duckman54

    duckman54 Senior Refuge Member

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    Hey Joe, with the pattern percentages I listed above would you say that is about average for a modified constriction?
     
  9. Ravenanme

    Ravenanme Elite Refuge Member

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    I would believe your choice of .015 would serve you well with just about any shot size that would give reasonable pattern density .
    Infact , I've seen this constriction pattern tighter than some Full Chokes with some larger shot sizes .

    Only the Patterning Board , tells No lies ! :tu
     
  10. Joe Hunter

    Joe Hunter Senior Refuge Member

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    duck -- I'm not sure what your true choke constriction is but here are some of my numbers for comparison. It looks like my Mod is on par with your .615 at 30 yards, they are both shooting about 93%. And, your .615 patterns a little tighter than my IM at 40 yards, 81% to 75%. I'm assuming your pattern percentages were the result of a measured distance muzzle to target, multiple patterns for average, true in-shell pellet counts from 5, and a post shot scribed 30" circle.

    Anyway, here are some of my pattern numbers with Briley Invector-plus flush Mod (.014”) and IM (.017”) chokes to show you what I found when I patterned them with several different 20ga steel loads in my gun.

    Pattern numbers from a 20-gauge Browning Citori with 28" Invector-plus barrels and Briley flush chokes (patterns average of five, 30" post-shot scribed circle, yardage taped muzzle to target, true choke constriction from bore gauge, and in-shell pellet count average of five).

    20 GA 3" FEDERAL CLASSIC MAGNUM STEEL LOAD
    1 oz #4 steel (186 pellets) @ 1,330 fps
    30 YARDS -- M / pattern 169 (91%)
    40 YARDS -- IM / pattern 127 (68%)

    20 GA 3" REMINGTON NITRO-STEEL MAGNUM LOAD
    1 oz #4 steel (191 pellets) @ 1,330 fps
    30 YARDS -- M / pattern 179 (94%)
    40 YARDS -- IM / pattern 147 (77%)

    20 GA 3" REMINGTON NITRO-STEEL MAGNUM LOAD
    1 oz #3 steel (152 pellets) @ 1,330 fps
    30 YARDS -- M / pattern 145 (95%)
    40 YARDS -- IM / pattern 114 (75%)

    20 GA 3" WINCHESTER DRYLOK SUPER-X STEEL LOAD
    1 oz #3 steel (145 pellets) @ 1,330 fps
    30 YARDS -- M / pattern 133 (92%)
    40 YARDS -- IM / pattern 106 (73%)

    20 GA 3" REMINGTON NITRO-STEEL MAGNUM LOAD
    1 oz #2 steel (118 pellets) @ 1,330 fps
    30 YARDS -- M / pattern 114 (97%)
    40 YARDS -- IM / pattern 99 (84%)

    Average percentages for all loads:
    30 YARDS / Mod flush choke (.014”) – 93.8%
    40 YARDS / IM flush choke (.017”) – 75.4%

    Good luck!
     
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