[Andy A.]

It's worth noting that poor crimps and loose terminals are probably a much greater source of resistance in the battery cables then the wire itself. Remember to periodically check that the stud terminals on the breaker and PDB are tight; they can and do loosen up over time. Also check whatever terminals you have put on the ends of the six gauge. A lot of teams have problems getting a reliable crimp on these much larger wires. If you go the crimp route, make sure you have an adequately sized tool and whoever does it has the strength to use it correctly.

Also, the Anderson connectors are well made but sometimes the contacts get a little charred or the crimp comes loose. Take a look at the contacts and give the wires a wiggle to verify they are clean and tight.