It's not so much a pull reducer as a torque multiplier. Yes it has to greatly increase the trigger pull or effective pull as you in fact pull it as the trigger rather than the trigger of your firearm and it in turn works as a lever to pull the firearm trigger for you. I'll not say it won't work but for me a trigger would have to be truly horrible and not fixable by a gunsmith before I'd mess with one. Still since I've not tried I can't know for sure the full effects of it.