Resistance is only one consideration on coil performance, but that one looks like it's way too low. A set of points can only survive a current flow of 5 amps, maximum, and with a system voltage of 7.5 or so with the engine running and the generator charging properly, your 6V coil primary resistance should be around 1.5-2 ohms. As the primary current starts flowing, there's also something called "inductive reactance" to consider, which causes the current to slow down a little. That's impossible to measure with an ohmmeter, or other test equipment that a hobby mechanic or even a professional auto shop would have. It's something an engineer would calculate while designing the coil, and we know engineers are very intelligent people without the common sense to come in out of the rain!
I'd recommend swapping to a coil with a bit more primary resistance- - - -yours looks like it's got some windings shorted together in the primary.
Jerry
