Frank Ettin
Administrator
[1] Competition is one thing, and real world self defense application is another.Considering the attention paid to optimizing trigger pull by manufacturers of 1911s and the fact that practically nobody runs a fully stock Glock or M&P trigger in competition, it is probably not trivial.
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Hardly scientific, but it appears the consensus is that trigger jobs will help you shoot better if you've got the skills to take advantage of it.
On the other hand if what you're saying is that if I handed someone who isn't much of a handgunner a weapon with a smooth, short and crisp 3-4lb pull and then we compared his shooting when he used a weapon with a stacky/gritty/slacky/mushy/spongy/etc 5lb pull based on criteria of speed and precision, I agree the difference would be null.
[2] A decent service grade trigger (crisp 4 to 5 pounds in a 1911, a smooth 5 pounds or so in a striker fired gun, or a smooth 10 pound +/- DA trigger) is one thing, and stacky/gritty, etc., trigger is another.
Bottom line is that if you can't shoot well with a decent service grad trigger, you need more training and practice, not a trigger job.
I know someone who is a police instructor and armorer and who could be an expert witness. He will state that a 4 to 5 pound trigger is appropriate for a service handgun (single action or striker fired) and that he will not set a trigger lighter than 4 pounds. If I used one of my 1911s with a 4.5 pound trigger, he will be testifying for me. If someone used a 1911 (or another handgun) with a 3 pound trigger, he will be testifying for the DA. His testimony will be something to the effect that as an expert he would consider carrying a gun with a trigger lighter than 4 pound is reckless.