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I have a Ruger Mark II 22/45 with a volquartsen Sear and Mark II hamer bushing to remove the mag disconnect. I also done the sling shot mod. My problem is the trigger is nice when I first start to shoot then sometimes the trigger pull seems alot more heavy. And it seem like the trigger does not want to reset. Will shortning the trigger plunger spring help?.

I would polish the hole in the trigger & maybe the outside of the trigger spring
Not sure about cutting the spring down as it's what resets the trigger mechanism..
Have you got a factory trigger spring in the trigger??
Good Luck!!
Gary

No, shortening the trigger plunger will make the problem worse. The trigger plunger is the part that provides reset tension for the disconnector. You may be getting some powder residue in your plunger hole and that's creating excessive friction. What kind of trigger is in your pistol?

R,
Bullseye

Thanks. It is the stock trigger and spring. It was pretty clean. I cleaned everything when I installed the sear. Took everything apart and cleaned it well.

Another way to assist the trigger is to bore out the plunger hole with the next size up twist drill. You want to be extra careful to not deepen the trigger plunger hole. The wider hole will allow the plunger to function more smoothly with less drag. A #9 (.196") twist drill will do the trick.

R,
Bullseye

Thanks I will give it a try.

Try everything and the trigger pull just is not the same all the time. Light then hard. Called voquartsen said to send it to them. I will give that a try?.

The Mark III's factory trigger spur could be catching on the magazine too. This would affect the pull of the trigger.

R,
Bullseye

I filed down the nub but still sent the sear back for a replacement. It just did not feel right. Maybe Nic can come up with something?. What stinks is that it had such a nice trigger pull then I would get a harder pull every so many rounds?.

Approximately how many rounds did it take before you started to notice a stiffer trigger pull?

R,
Bullseye

About 5 rounds. It would vary. I would get a nice pull then I would get off target because of the heavier pull.

I've been trying to conceptualize different scenarios where this type of problem could happen and the likely causes, but I have to say that I'm drawing a blank on this one. Five rounds to an erratic trigger pull is highly unusual if none of the pistol's pivot pins are dislodging. How's the clearance between the thumb safety hook and the top of the sear? Is there any movement that could be causing the safety hook to be interfering with the sear's movement?

R,
Bullseye

Seems more like an installation problem rather than a part problem. Have you tried shooting with the OEM sear and VQ bushing?

greener wrote:Seems more like an installation problem rather than a part problem. Have you tried shooting with the OEM sear and VQ bushing?

No installation problem thats for sure. I Reinstalled the Volquartsen sear many of times. I have the Stock Ruger sear in now and works perfect. Same trigger pull all the time with the stock sear but just a little harder pull. Not a nice light pull I would get sometimes with the Volquartsen sear. I will see what happens when Nic sends me a new Volquartsen sear but the way that it was shooting is un acceptable with the volquartsen sear.

Bullseye wrote:I've been trying to conceptualize different scenarios where this type of problem could happen and the likely causes, but I have to say that I'm drawing a blank on this one. Five rounds to an erratic trigger pull is highly unusual if none of the pistol's pivot pins are dislodging. How's the clearance between the thumb safety hook and the top of the sear? Is there any movement that could be causing the safety hook to be interfering with the sear's movement?

R,
Bullseye

Thanks. Everything seems fine?. The safety seems fine. I put the stock Ruger sear in and everything works good with the Volquartsen Mark II hammer bushing?. I will try the new volquartsen sear and see how it works out. One thing for sure is Volquartsen has nice customer service.