Weighing Triggers

Although the rule numbers quoted are for ISSF, the procedures are applicable to trigger weighing for all events with a minimum trigger pull.

8.4.1.6.1 Note:

A weight with a metal knife-edge or with rubber must be used. A roller or other round configuration on the test weight is not permitted. A dead weight must be used with no springs or other devices.

8.4.1.6.2 (Measuring the Weight of the Trigger Pull) The weight of the trigger pull must be measured, with the test weight suspended near the middle of the trigger (see illustrations)…

Note that the artificial ‘half way’ between the pistol body and the trigger ‘length’ in the 2001 rules has been long removed.

The trigger pull is measured where the shooter applies the pressure to fire the pistol. If the trigger pull cannot be measured at this place on the trigger, the pistol cannot be approved.

…and the barrel held vertically…

This can make a big difference.

…The weight must be placed on a horizontal surface and lifted…

Additionally, the horizontal surface should be clean and dry.

Note the new illustration in 8.4.1.6.2.

· The illustration in previous rules was indicative that the pistol supports the weight visibly clear of the horizontal surface; the pistol is raised to lift the weight, not the weight lowered on to the trigger.

· Although not stated in the written rules, this illustration shows that the weight is suspended from the side that the shooter uses (right side for right-handed shooter)

…The tests must be conducted by Equipment Control officials.

The tests must be conducted by Equipment Control officials – not the competitor, team official, etc. This includes random checks (8.4.1.6.4)

…The minimum weight of the trigger pull must be maintained throughout the competition…

In practice this is checked during Equipment Control and random checks (8.4.1.6.4), unless “(6.4.8)… there are any doubts regarding an alteration, the equipment must be returned to Equipment Control for re-inspection and approval.”

…A maximum of three (3) attempts to lift the weight is allowed

This refers to the Equipment Control approval before the event. At the initial check if the pistol does not lift the trigger weight after three attempts it should be given back to the shooter for adjustment – after 3 attempts the shooter is not to hold up others waiting for Equipment Control.

. If it does not pass it may only be resubmitted after adjustment.”

‘Resubmitted after adjustment’ only refers to the Equipment Control approval BEFORE the event.

In a random trigger weight check (8.4.1.6.4) or a check under“(6.4.8) AFTER the shooter has fired a competition shot, failure to lift the trigger weight after three attempts will lead to disqualification – the shooter is NOT allowed to adjust the trigger so that it passes.

When testing air or gas actuated pistols, the propellant charge should be activated.

i.e. air pistols to be charged at least partially, to enable the discharge of a propellant charge.