Double- and Single-Set Triggers - Adjustment and Safety - by Dick Trenk
When improperly adjusted, a strong enough shock can cause the cocked hammer to be released and fire the gun. When properly adjusted, Pedersoli set triggers will not release when subjected to a strong shock. Read the instructions below in order to make adjustment correctly.
WARNING: Before making any adjustment make certain the gun is unloaded.
set trigger adjustments
Turn screw located behind the rear trigger, inwards until hammer will
stay cocked without having the rear trigger “set” (clicked.)
The front trigger will release the hammer even if the rear trigger has
not been “set.”
set trigger adjustments (Rolling Block
type rifles only)
Double set trigger adjustments
type rifles only)
The single adjustment screw is turned inwards until the REAR trigger
will not “set” when pressed firmly backwards.
SAFETY TESTING THE ADJUSTMENT
If the front trigger has been set with a very short and light engagement it is possible that a strong shock or vibration might cause it to let the cocked hammer fall unexpectedly resulting in a discharge of the gun.
To prevent such an accidental discharge perform the following safety test.
1. Insert a fired cartridge
case so the firing pin will have the dead primer to fall against and
avoid damage to the firing pin.
Sometimes it is necessary to “uncock” and unload the rifle after it has been prepared to shoot and the rear trigger has been “set.” This is done safely as follows.
1. Keep gun barrel pointed
in a safe direction.
1. A small adjustment screw
is located behind the trigger blade .
UNSETTING THE SINGLE SET TRIGGER
Once the trigger has been “set” and the hammer cocked, the only way to unset the trigger is to carefully hold the hammer while at the same time pulling the trigger as though to fire the gun.
Once the hammer has been released it can be slowly lowered to the uncocked position.
This is a very dangerous procedure because if the hammer slips from your fingers a loaded gun could fire!
Never attempt to uncock a flintlock action without first removing all the powder from the pan or removing the percussion cap from that type of gun.
Additionally, with a flintlock, place the frizzen in the “open” position so the flint cannot strike the frizzen and make sparks.
Keep the gun pointed in a safe direction in case the hammer does slip and make some sparks.
Remember there is a powder charge inside the chamber and it could be ignited by even a few small sparks hitting the empty pan.
Note that guns with a single set trigger can be fired without first setting the trigger. With a cocked hammer simply pull the trigger more firmly and the hammer will be released.
TO PREVENT ACCIDENTS
If you allow others to shoot your pistol or rifle, we suggest letting them try the set trigger operation before allowing them to actually load the gun. The very light trigger pressure is a big surprise to many shooters who have not had previous experience with the single or double set trigger system. The hammer does not have to be cocked to allow this trigger practice. Just set the trigger and allow the new shooter to experience the light pressure required on the front trigger of the DST type or the single trigger of the SST type.