26 gauge

Working on my dual coil build using a 3 mm nail to jig. My Bec Pro reportedly supports Resistance ranges from .2-ohm to 9.9-ohms but my 6 wraps ohm at 5.5 or so and my Bec pro keeps saying power reduced and gets all the way down to 10w after I'd set it around 23-30w or so. I don't understand...