Hunting guns should not have a trigger so light that it jars out of bent when dropped, or in a fall. Target guns are different, and are used under much more controlled circumstances. When I lighten a trigger on a gun I test it, unloaded of course, by bumping the butt on the floor or ground, solidly enough to simulate a drop or fall. I hit the side of the buttstock with my hand, in short I do everything I can to cause it to jar out of bent. If it is under 4 lbs., and passes my tests, I feel pretty good about it. I've never had one to fail except for one which had a soft tumbler and wouldn't "hold" the adjustments I did.

SRH

May God bless America and those who defend her.