All I'll say on the subject is be careful on marketing literature. Braile advertises Pulse cranking amperage and calculates what that rating would be in CCA. They may work perfectly fine but why don't they perform an actual measurement that meets and industry standard test? Don't pay more money based on a good marketing scheme. Don't get me wrong, I'm not saying the Braile is not any better or worse, just that you should think if the cost delta is worth the price. A lot of 310CCA batteries that are filled and charged by a dealer or individual get a bad rep because they are not activated correctly and therefore have a short/unreliable life. Get yourself a FACTORY (Battery Factory that is) activated 310CCA battery from Interstate or BDM and keep it maintained.
Unlike CCA and MCA the pulse cranking ampere (PCA) rating does not have an "official" definition; for true engine start purposes, a 30 second discharge is unrealistic. With that in mind, the PCA is a very short duration (typically about 3 seconds) high rate discharge. Because the discharge is for such a short time, it is more like a pulse.