I did my first IDPA this past Sunday and I used my PCR. I was told I can't use a decocker. Either it had to be fully decocked or uncocked. I chose fully decocked. I didnt understand the reason of why I couldn't just use the decocker. Trying to fully decock it seemed more of a safety hazard imo.
Agree with @steel
The IDPA rules actually require the decocker to be used, if the pistol is equipped with one.
A.1 Stock Service Pistol Division (SSP)
A.1.2 Start Condition
A.1.2.1 Selective DA/SA firearms will start hammer down.
A.1.2.2 Firearms with a hammer de-cocking lever or button
will have their hammer de-cocked using the lever or button.
A.1.2.3 If the hammer must be lowered by pulling the trigger and manually lowering the hammer, the hammer will be lowered to the lowest position possible.
A.1.2.4 Manual safeties may be engaged at the shooter’s discretion.
A.2 Enhanced Service Pistol Division (ESP)
A.2.2 Start Condition:
A.2.2.1 Single action only firearms will start with the hammer cocked and the safety engaged.
A.2.2.2 Selective DA/SA firearms may start cocked and locked or de-cocked, at the shooter’s discretion.
A.2.2.3 DA, DAO, or striker fired firearms with a de-cocking lever or button
will be de-cocked using the lever or button.
A.2.2.4 DA, DAO, or striker-fired firearms may have a manual safety engaged at the shooter’s discretion.
Notice the highlighted words.......they make the use of the decocker mandatory, not optional.
My experience with local IDPA match Safety Officers is that they are severely lacking in rules knowledge, at least in my area. I say that after several years of comparing them to USPSA Range Officers. For the sake of disclosure I am a USPSA certified Range Officer.