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Thread: highly calibrated trigger pull gage

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  1. #1
    Deceased August 5th, 2016 goo's Avatar
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    highly calibrated trigger pull gage

    it does smell a little fishy....

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    http://farm4.static.flickr.com/3467/...2c6a372d47.jpg
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    http://farm4.static.flickr.com/3466/...c883e3f7eb.jpg
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  3. #2
    John Kepler
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    Yeah....well....where the trigger weight counts, they use REAL weights and don't take many/any excuses! One of the guys that placed VERY high (2nd or 3rd) in the Vintage Rifle Match at the Nationals Friday with a K-31 was eventually DQ'ed when his rifle failed to pass trigger-weight! Embarrassing!

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  5. #3
    Deceased August 5th, 2016 goo's Avatar
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    the swiss k 31 trigger probably had holes in it.

  6. #4
    John Kepler
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    May be.....but those goofy little gizmos sure as heck can shoot....any "holes" notwithstanding!

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    The fish scale I saw was more reliable than this one. They used a postal scale to weigh a bass at exactly 4 lbs, 8 oz. They used it by placing a hook in the fish's mouth and a second on the tirgger and raising the rifle off the ground. If the flopping fish did not release the trigger, the gun passed.

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    kirk, down here we'd have had to cut a bass in half to get it to 4 1/2 lbs

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    The minimum pull for a K31 (and the Gew1911 series) in the Swissicon rulebook is 1300 grams. That works out to 2.86 lbs. You frequently have to tinker with a Swiss trigger to get it to hold the 3-1/2 lbs that the US rules require. When CMPicon invented the Vintage Match, I asked if they would respect the foreign rules. You woulda thought that I violated somebody's daughter ....

    I use a prehistoric set of NRA-Certified weights.

    Resp'y,
    Bob S.

  10. #8
    John Kepler
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    When and if you shoot in Switzerlandicon....you can certainly play by their rules. If you are going to shoot in the US (or in anything governed by the ISU....they are the one's mandating the 1.6 kg minimum trigger!)....you play by ours. What part of that is hard to understand?

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    The intent of the Foreign Military Bolt Match (as it was called then) was that rifles would conform to their original specifications. (What part of "as-issued" isn't clear?) CMPicon has since decided that is too hard to police, so everyone must conform to artificial US rules, like carburetor restrictor plates in NASCAR. That's not hard to understand, but shooters who choose the Swissicon rifles need to be warned that they may have to alter their triggers to conform with the US rules. I have 3 of 6 K31's and 2 of 4 Gew 1911 that would not hold the 3-1/2 lb weight as I received them.

    BTW, the ISSF rules (it hasn't been ISU in years) for Standard Rifle trigger pull is 1500 grams, not "1.6 kg".

    Resp'y,
    Bob S.

  12. #10
    John Kepler
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    That's the ISU (I'm an old dog Bob with no interest in what the Frogs are calling things these days) Big Bore rules....they have a "Military Rifle" class at 1.6 kg, or 3.5 lbs, which is recapitulated in IIRC, NRA HP Rule 3.1.5 (Foreign Service Rifle). That's the part of "as issued" that obtains, and it's an issue of safety and uniformity. Oh...and for what it's worth, my 3 K-31's have NO problem passing a Vintage Rifle trigger weight....neither did the MANY other K-31's that shot in the Match Friday, including the Match Winner! Funny that only ONE rifle had a problem with the trigger weight when if, as you say, they ALL have under-weight triggers "as issued"? Curiouser and curiouser!

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