Trigger pull problem / question|Restoration, Repair and Maintenance|Forum|Winchester Collector

I have an 1894 rifle that is a bit rough, but great for shooting. The problem is the trigger pull is much harder to pull than other Winchester lever guns I’ve shot. So I took it apart and here is what I found.. The pin that goes through the frame and hammer fits the frame fine, but it is sloppy in the hammer hole. I’m thinking being this loose on the pin the hammer is binding or is in a twist on the sear. Would the proper fix be to bore or drill out the hammer hole and machine a bushing to more closely match the diameter of the pin. Basically tighten things up. If the hammer is case hardened it may be necessary to use a carbide drill bit. Has anyone had a situation like this before and if so how do you correct it. Thanks in advance.    RRM