OK, here's my handy dandy trigger pull gauge. A boot sock, shotgun shells, a coat hanger with a hook on both ends and a digital postal scale to weigh with. One hook over the trigger, one hook through the sock and add shotgun shells. When you lift the weight, the stretch in the sock keeps the weight from suddenly impacting the trigger. You need to hold the gun, with the weight suspended, for a few moments to allow for any creep. Very accurate and very consistent.
For those of you with purpose designed trigger pull gauges, try this in comparison. You might be surprised.