OMG. I am so stooopid. The Billet Box has been wonderful, exept last night and this morning. I have fresh batteries, but nothing. Then it fired two or three times....nothing.
I haven't used cartos for so long, I forgot they don't last for months!!! And do I have another with me? No. Luckily, I do have 2 other devices to get me through the day.
Check the voltage on your batteries with a multimeter to ensure they are indeed charged. Also double check the brass ring to ensure it is seated and providing enough pressure to make contact to fire the carto.
Personally, it sounds like the batteries are almost dead. If you let them set they will refresh themselves a little to fire once or twice and go dead again. That is what has happened to me when my batteries went dead. I picked it up 10 min later and it fired twice more. If you have an extra set of batteries slap em in, and try them out.
Dan