Got 4 new RCR123A batteries in today and made a quick battery mod with some tubing and bottle caps. Continuity checks out with no shorted wires. Voltage w/o a load reads 6+ V but they will not firing the carto. I tested the mod with an old pair of cr2's and it works fine. Also, I've tried other good cartos and nothing. The carto's are the new double coils and read 1.7 ohms. Do I need a 5v reg? I bought the batteries from an amazon battery store, and they are the blue tenergy brand. Any help is great, thanks.