Would someone please explain the difference between all of the trigger types? Single Set, Double Set, Single Stage, Double Stage and any more

Reddman,

A set trigger is one that if pulled without setting has a "stiff" pull (usually 3 or more pounds), but if "set" first, the break can usually be measured in ounces. A single set trigger only has one trigger, and you set it by pushing it forward until it "sets", then you pull back like a normal trigger to fire. A double-set trigger has two triggers, the rear "sets" and the front fires.

A double stage trigger has some slack that is taken up before you feel a higher pull weight, which then breaks to fire. A single stage trigger is most common, and just breaks when you get to the trigger pull weight.

Hope this helps and I did an adequate job of explaining,

Bill

Reddman----

Stuart Otteson has a good book on some types of triggers.

One trigger is the "Direct-acting" trigger. Military bolt actions all have them. The trigger PULLS the sear out of position and lets the firing pin fall. Most do this in two "stages".

Another direct-acting trigger is the simple hammer and trigger/sear of lever action rifle and revolver designs.

Sporting triggers in this country are almost all "Over-ride" triggers. In this system the sear is *supported* by the trigger and when the trigger is moved the sear is released and the firing pin falls.

"Set" triggers can be used on either type, but almost all double-sets are used on direct-acting triggers and the single sets on over-ride systems.

A "Double-set" uses one trigger to cock a strong spring that is released by another trigger with a much lighter trigger pull. On release the tail of the first *cocked* trigger hits the sear and releases the firing pin.

A "Single-set" trigger uses the inertia of the trigger to fire the gun. The trigger is pushed forward against strong spring tention until a secondary sear catches the trigger and holds it forward. When tripped the trigger flys to the rear and the inertia of it also trips the primary sear.

ALL SET TRIGGERS double lock time. They are NOT bench rest triggers.

Multi-lever triggers use more than one part to reduce the amount of tension/pressure between the parts. Some can be adjusted to less than an ounce and do not affect lock time. These are called "Two or Three lever triggers" or "Target triggers". Some have as many as five levers. All are VERY sensitive to contamination and are safe in target situations only.

Otteson's book concentrates on multi-lever triggers.