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365 Posts
I bought a USPT 45 the other day that was sold as used, but upon receipt, it's clearly new, unfired ()maybe someone bought it, but they never shot it). So I did the checks related to in the "what makes the Expert trigger better" thread, and see that it has the blue hammer spring, so I suppose it has the standard leaf spring and trigger reset spring.
Trigger pull is crisp, but around 4.5-5 pounds according to my finger scale. DA pull is heavy and above 10#, I'd guess.
So I ordered the match trigger reset spring, match leaf sear spring and match hammer spring from HKParts last night.
I will replace all three springs, but my question is, which of the three makes the biggest difference in pull weight, or is it the combo that does it?
I'm thinking the hammer spring will make a small difference in SA, and a noticeable difference in DA.
I can only imagine that the trigger reset spring will change the "preload of the trigger, not the actual pull/release weight.
I read that the sear spring being nickel plated helps to keep the pull smooth, not gritty.
So with the parts, how much of a reduction from the theoretical 4.5-5# will I see?
Trigger pull is crisp, but around 4.5-5 pounds according to my finger scale. DA pull is heavy and above 10#, I'd guess.
So I ordered the match trigger reset spring, match leaf sear spring and match hammer spring from HKParts last night.
I will replace all three springs, but my question is, which of the three makes the biggest difference in pull weight, or is it the combo that does it?
I'm thinking the hammer spring will make a small difference in SA, and a noticeable difference in DA.
I can only imagine that the trigger reset spring will change the "preload of the trigger, not the actual pull/release weight.
I read that the sear spring being nickel plated helps to keep the pull smooth, not gritty.
So with the parts, how much of a reduction from the theoretical 4.5-5# will I see?