Hi, The whole point of the RTF, is to show you that your "mask" is working and you soon find out when, you haven't put it on right.
When your at Halton doing your Regt Trg, you only remove your Mask once unless you fail and have to go back again. But once you have passed out of RTS and move to your Parent Station you do CCS "Common Core Skills" once every year or you are due OOA "Out Of Area" ie Iraq.
Mostly at your Station they ie the Regt only use a few pellets and you only remove it once or twice, to show you can do the Immediate Drills correctly.
But to be honest, CCS is a break from work and even though you hate the thought of doing it every year, once you've finished for the day and didn't get a lung full. You will look back and have enjoyed it.
Heggars