The two primary springs I'm thinking of are the mainspring and the rebound spring. How do they differ in how they affect the feel and pull of a trigger?

Have some of you opted to only change one or the other only?

I read on a youtube description that the rebound spring has no affect upon how hard the hammer strikes. Is that correct?

The hammer spring has the greatest affect on the double action pull, and can also have an effect on the primer strike

Yes, very often, only one spring will be changed. Which spring to change depends on what your attempting to accomplish.

Yes, that is correct.

But it does change the DA pull weight.
Have several I have done that to.

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Only difference Fool/Mule-ears

Yes it does, and it can even affect single action pull as well.

Easiest way to lighten your trigger pull is to buy a set of Wolf rebound springs and a light main spring. The rebound springs will drop your single action from an average 4 lbs to about 2 - 2 1/2 lbs. It has no affect on how hard the hammer will strike your primers.

The reduced mainspring will help lighten your felt trigger pul but may cause failure to fire problems if it's too light.

I've never had a problem with the Wolf springs and getting 100 % ignition. I use the lightest rebound spring I can get but shoot so often that I don't have a problem with trigger reset. Go with the 12 lb rebound spring and you should be o.k.

There is one potential drawback to just replacing springs without having the sears better fit to each other. If there is some creep in the trigger let-off, lighter springs will exaggerate that play, making it more obvious than before. A higher pull weight will require more effort to release the hammer and hide the creep because the sears won't move until the pull weight is reached and then they move right through. Less pull weight allows the sears to start moving before the release weight is reached.

Timney makes a trigger kit for Remington 870 and 1100 shotguns that consists of an adjustable sear and three pull weight springs.



I installed one in a new 870 Super Slug back when that model first came out and just for grins, tried just replacing the spring. The result was a horribly sloppy trigger so I put the new sear in and the trigger became very rifle-like, just as Timney advertises.



So don't believe that a different spring or springs will cure all your trigger ills. Sometimes a little gunsmithing will be required since adjustable sears are not available for many guns.

Ed

Thanks for the advice, everyone.