get a hold of patriot springs in ohio they sell trigger springs for about $10.00. Mine went from 61/2lbs to just under 3lbs of trigger pull.
you can clip a coil off but go slow as it will go full auto if you cut to much off.
You are much better off buying a different spring than clipping coils... Clipping coils is an ill advised practice and besides, if you don't like the result of the new spring you can always go back to the original setup.
Step one is the spring. Step two is take a look at the hammer notch and sear relationship.
Sometimes they drag on each other because the mating surfaces are not square and smooth.
You can polish the mating surfaces with a stone. HMB
Get the timney trigger fix for it, it's a sear and three different weighted springs. The springs plus the adjustment screw for them will let you get anywhere from 2-6lbs and it's very crisp. This works for the 870, 1100, 1187, 552, and 572.
This is a niche that needs to be filled, there used to be a gun smith in VA that reworked Rem and Beretta triggers down to about 3.25 lbs and got almost all the slack out of the triggers, round trip shipping and trigger job was about $50. Alas, he passed away a few years ago and I haven't heard of anyone doing this since.