Testing Trigger pull HELP

Discussion in 'Handguns: General Discussion' started by Kahr33556, Nov 27, 2013.

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  1. Kahr33556

    Kahr33556 Member

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    Question,.
    for a chep trigger pull test could I use a known object like a bowling ball 6,8 ect.set it up and slowly put the weight on the trigger.
    will this give me a true LBS trigger pull weight test ?
    Just asking
     
  2. bannockburn

    bannockburn Member

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    Not sure how using your bowling ball is going to work measuring your trigger pull weight, but a quick search of Brownells turned up a Feather River Tru-Weight Trigger Tension Scale. Price is around $24 and it measures anywhere from 8 oz. to 10 lbs. Seems like it would give a more accurate (and easier to obtain), reading than whatever sort of set-up you have in mind.
     
  3. RaceM

    RaceM Member

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    Close enough. I've got an old edition of the NRA gunsmithing guide showing trigger pull testing on an M1. Basically a rod with a hook for the trigger and weights on the other end.
     
  4. JohnBT

    JohnBT Member

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    I wouldn't try putting the weight on the trigger, but maybe your hands are steadier than mine. Use a string or a wire on the trigger and try lifting the weight off the bench. Add weight until the trigger will lift it. That's the official way. They still sell the NRA-approved rod-and-weight sets.

    I used to use pyramid sinkers. I had bunches of them with some as big as 14 ounces for surf fishing Hatteras. Bags of sugar and flour and such come in handy one- and five-pound sizes. At least they used to before everything started shrinking in size except the price.

    Some folks use plastic bags full of water. If you can measure the water you can calculate the weight you've lifted.
     
  5. Kahr33556

    Kahr33556 Member

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    Never mind I fixed my trigger there was raised material on the strikers bar.
    A stone to the trigger bar and strikers bar fixed my trigger pull problem
     
  6. earplug

    earplug Member

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    Water.

    A pint is a pound the world around.
    Any container and a connection to the trigger.
     
  7. 340PD

    340PD Member

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    I use a rod with a 90 degree bend on one end and a hook on the other and pull with a fish scale.
     
  8. kitsapshooter

    kitsapshooter Member

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    A pint is not a pound the world round.

    The density of water varies from 0.9991026 g/mL at 15 C to 0.9956502
    g/mL at 30 C according to the NCSU site, so the figure calculated will vary from 8.337915 to 8.309104 lb.gal over this
    temperature range.lbs

    and remember the whole world does not use the imperial measurement system.

    A man needs a good trigger pull scale or a good quality fish scale
     
  9. herrwalther

    herrwalther Member

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    My first trigger pull gauge was very low tech. It was a piece of parachute cord I would tie around the trigger and tie the other end to plate weights ranging from 1.5 to 5 pounds. Served me pretty well for a couple years until I upgraded to a slightly higher tech but still money saving option of using a fish scale. Still plan on getting a "real" trigger pull gauge, maybe even a digital one, eventually.
     
  10. BCRider

    BCRider Member

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    The IPSC trigger pull test uses a rotating wheel that rests onto the trigger and the gun is held pointed up. That way the wheel on the L shaped wire that lifts the weights rolls into the low spot where the trigger finger will naturally also tend to rest. A curtain or other pully wheel of some sort put onto a wire rod hook will do the same thing. Then use it to lift up a bucket of sand or water where you add weight a little at a time until you can just barely lift it up without the trigger breaking. Then add the trifle more to make it break. Once done lift up the whole rig with a low cost digital fish scale and you have your trigger pull value down to within 1/2 an ounce.

    If you're using sand, sugar, salt or water or even #8 shot as the mass it just doesn't matter if you use a fish scale at the end to weigh the whole rig. Density values and localized variations in gravity mean nothing because you're weighing the actual mass that did the job to make the trigger break.
     
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