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Typically, your trigger will have a "take-up", which is the distance in which when the trigger travels from its normal rest position to when it "hits a bump". Then at that point you have to use more force to over come the contact pressure between the hammer and the sear. The first is affected by amount of slack between everything, and the 2nd is affected by disconnecter and hammer spring rate(among other things). Take-up can be measured by distance, and the pull is measured by force(or "weight", since its measured in lb force). The way 1911-style single action trigger is designed, you can, through some tuning, to get the take-up to be practically nothing, and a very light trigger weight. Which is one of the reason why its popular as a competition platform.
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