Uhhhhh, a good trigger should never fire while closing the bolt no matter how abusively you cycle it. It should also never fire from being dropped or the butt of the stock slammed on the ground. I've never had it happen with any of my triggers from 2oz. Jewells up to heavy Mauser triggers in the field or on the bench. If you are experiencing that happening, then you have a very badly configured trigger or it is broken and you should replace it. Increasing the weight of pull will not fix those issues! That sounds like a sear engagement problem.How light can a good trigger be set and not have have it let go if you slam the bolt closed?