doublegunshop.com - home Forums General Discussion DIY Gunsmithing @ doublegunshop.com My Valmet Lion and its Herculean trigger pull

Go slow, understand the geometry, test it quite a few times after each adjustment.

Yes, assuming you stick to work on the sear, if you shorten it too much another will need to be made.

I have seen people do all sorts of crazy stuff trying to adjust trigger pull.

If everything else is in good condition and functioning as it should, your adjustment will be to the angle at the tip of the sear. I have seen damaged and altered hammers, trigger blades binding etc, but ruling those things out, a slow and methodical stoning of the sear changing its angle is the correct methodology.