SR1911 trigger job

[y2k-fxst]

Looking at having my SR1911's trigger pull cleaned up. Not wanting a "hair trigger" by any means just a crisp trigger pull around 4.5 pounds would be ideal.

I have heard mixed opinions about doing a trigger job on MIM parts. Some say the polymer used in the MIM process is not fully cooked out during the process and will cause some stiction even with polished mating surfaces.

Would I be better off either forgetting the trigger job until I can source standard hammer and sear or is it good enough to just use the factory MIM parts.

 

[Carry_Up]

Reading your post tells me that you don't have much experience evaluating trigger work. Nothing to be ashamed about, but it calls for caution since you can do a lot of damage very easily. Nobody prefers a heavy gritty trigger. But, there are many types of safe trigger arrangements, not just ones that fall into the category of "crisp" or "glass break". These are handgun magazine buzz words anyway. Military 1911's averaged out at 8-9 pounds, which nobody admires, but was plenty safe. Also that trigger would remain virtually the same over the lifetime of the gun - something that you can't say about light target triggers. I would leave well enough alone for the time being while you gather some information about trigger work (assuming you would like to do the work yourself). The AGI videos on the 1911 have lots of good information if you need a place to start.

CU

 

[Precision32]

What kind of trigger pull does your 1911 have now? Is it creepy? Pull weight?

The comments on MIM are not reality based. Not sure where you picked that one up.

The center leg of the sear spring can be adjusted to drop the pull weight. Hold the entire spring above the ends of the cuts and only bend the leg of the spring. Make changes of 1/8" and try it trigger.

 

[y2k-fxst]

My factory setup gives me a 6.5# pull with a lot of creep. What I call "slop" the trigger travel prior to engaging the sear is tolerable. I have had previous trigger jobs done on 1911s. Just was unsure about the MIM parts used in the SR1911s.

Have only heard about the stiction on the MIM parts and the possibility of them just being surfaced hardened while cruising the internet. Came here to get advice from those who deal with Ruger parts and might have first hand experience.

 

[DeletedMember275]

I would suggest asking a gunsmith who specializes in 1911s and see what his response is. I do know that Hamilton Bowen will not even attempt a trigger job on MIM parts, but that may simply be personal preference.

 

[Precision32]

They use the MIM process for the production of cams and gears. I've done many trigger jobs using MIM parts and never had an issue.

 

[Chuck 100 yd]

MIM... OMG the sky is falling.

You can buy Hammer/sear sets and springs that will/can make that trigger better.
Unless you know what you are doing and have the special tools needed to check engagement, leave it to a qualified smith to do.
The Sr 1911`s are not intended to be target/NM guns. They have safe triggers that are far better than a standard combat 1911 / 1911A1 and that is what the gun was designed to be over 100 years ago.