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Discussion Starter · #1 ·
I hope I didn't make a mistake here. I just bought a Nowlin Pro-Match drop in trigger job for installation in a gun I'm working on. That gun is at Tripp Research now, so I decided to try the kit in my Kimber Polymer just to check it out.
I would have to say that the Nowlin trigger job is "crisper" than the standard Kimber
parts but the pull itself seemed like it was about 6-7 lbs! That's just a guestimation since I don't have a scale.

The Nowlin mainspring was MUCH stronger than the one that came with the KP. I replaced the new mainspring with my old one and that helped a little. Maybe got it down to around 5 lbs.

I'm pretty sure my trigger pull with the standard KP parts was about 4 lbs. All I ever did to those parts was lightly mirror polish the engagement surfaces with jewelers rouge and a little felt buffer. I have put approximately 3000 rds through the KP with the original parts.

Will the Nowlin trigger job get lighter over time as I shoot it?

It's supposed to be a 3.5 lb. pull right out of the package so I am a little disappointed. Am I supposed to do anything to the kit besides just put it in the gun, like trim the mainspring?

The whole point of my spending $120.00 on this particular kit was to:

1. have good quality parts (non MIM) for the new gun
2. not have to have a gunsmith do a trigger job on it

I'm thinking now that I might have been better off spending the $50 or so it would have cost for McCormick parts (like those that come with the KP) and just polished them like my old ones and had a 4 lb. trigger.

Any one with experience with one of these kits or ideas on what might help, please let me know what you think.
 

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Hello,
You have a message nearly identical to the one which I just planned to post.

I have been considering an Actions.by.T Terry Jacobson 'drop in ' Set and was wondering if anyone had experience with these. I have a new Kimber and wish also to rid myself of these MIM parts

Best, and thanks for any assistance :wink:
 

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One of my Kimbers (the project gun seen here) had a so-so trigger, and another had a nearly perfect trigger. The MIM parts may or may not fail, but they're harder than woodpecker lips, which makes them hard to cut or polish much.

Check the sear spring tension re: the trigger weight. The pull weight probably won't change much with use, though the feel of the break and reset may. I highly recommend the recording trigger pull gauge from Brownell's, the one they cite as "perfect for use with extractor tension gauges". It takes the guesswork out of trigger work. Everyone should also secure a copy of the excellent article on trigger work written by Jack Weigand and located on the Brownell's Tech Tips section on http://www.brownells.com.
 
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