How do I do a trigger job on a Lyman Great Plains pistol ?
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- Last Post 01 February 2022
That should get you started.
My GPP doesn't have set triggers. It is a single trigger.
Pull the lock off and see if there is an adjustment screw on the sear notch. If there is, you should be able to adjust to minimum engagement. Check the finish on the mating surfaces of the sear and sear notch. If they are rough, stone them smooth being careful not to change the angles. These parts should be hard as woodpecker lips so take your time and smooth the mating surfaces. Check the trigger where it pushes up on the sear, triggers are usually soft and can develope a burr that effectively increases the trigger pull.
single triggers are adjusted by filing a forward pitch to lighten the trigger. The trigger probably has a vertical plate that pushes against the sear. by filing that plate to slope down toward the muzzle. makes it push more toward the rear of the sear and require less force. It's helpful to know exactly where the 2 surfaces engage and figure out how much to change. If your trigger is different than most of the single triggers-then I don't know.
Go slow and good luck.
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