10 gauge lifter double firing--both hammers fall
 

Ok Guys, I know several of you must have dealt with this issue before. My Parker 10 gauge lifter doubles sometimes when I fire it. The trigger pull is about 2 pounds on both hammers! I have had the gun professionally cleaned and locks look brand new with no appreciable wear.

The gun double fires about 40% of the time. I understand that the angle on the sear engagement needs to be changed. Is this the correct way of correcting this issue? I would like to see a normal trigger pull of about 6 pounds like my other double guns have. Any help would be appreciated.

Thanks!

2 lbs. is much too light on a game gun but 6 lbs. seems just a bit heavy... but it is your gun and your choice.

Having the sears stoned by a gunsmith who knows what he is doing is, as you presumed, the correct way to eliminate that doubling problem. I would have suggested a good cleaning but you have already taken care of that. Good luck. The right person should have no problem correcting that issue.





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Thanks Dean,
I shot this pheasant this morning with my lifter D grade 10 gauge with factory 28" barrels. It was the last day of the Idaho pheasant season. The triggers are definately way too light![IMG][IMG]https://photos.google.com/photo/AF1Q...iYPHhXkQXoIZY2[/IMG][/IMG]

As dean said, the trigger pull on both triggers is way too light. the recoil from the first shot is setting off the second. Both sears need reworked to firm up the trigger pulls and correct the issue of doubling.

Hammer springs on lifters, and top lever hammer guns made by Parker, were always stout. These springs play, in part, to trigger pull. Lightening the springs for ease of cocking both hammers with the trigger hand thumb is something hunters learn to do early on when hunting with a hammer gun.
While there are many accomplished gunsmiths, not all are well versed in spring work, and lightening and polishing a hammer spring is not a job for just anyone.
Light framed guns shooting moderate to heavy loads need to have trigger pulls set accordingly; generally 4 lbs, or more.
With the exception of my skeet gun, I have only shot double trigger guns, and have learned to like my left barrel trigger adjusted to a half pound heavier than my right barrel. (3.5 lbs right, 4 lbs left)

Simple solution. Only load one barrel. Ha.

I have 5 Parker Hammer guns, never had to work on the locks other than to clean. They are more delicate than locks I have worked on and spares not easily obtained.

I have worked on a number of exposed hammer locks. Trapdoor Springfield's and US Muskets used in competition mostly. It's common and fairly easy to adjust trigger pulls by lighting the sear spring. When I do it I always have a spare or two, it's a trial and error job . Some will lighten the main spring. Usually a mistake but some locks need it, problem is getting misfires if too light. Altering the sear - hammer engagement is often seen and I think always a mistake for the home mechanic. Not many have the ability to improve on the factory set up. If it has not been "worked on" it's probably correct if it has been filed it needs work for sure.

My bet is somebody lightened the sear and hammer springs years ago. Unless you have spares to try better send it off to somebody competent.

William

Thanks William,
The gunsmith I use has had a lot of experience with this issue. The gun is there now. He will gradually stone the sear engagement until both hammers are at 5lbs of trigger pull. It would be nice to have an extra set of hammer springs. Are the springs the same between 12 and 10 gauges?

thanks,
Thayne

Is this the same smith that put the bolt in upside down on your other gun?

No. This is a different gunsmith.