Welcome Dr Mac. First thing to remember with commercial cast is that the product is produced at least cost, with shipping damage in mind. IOW, they want the bullets arriving in an un-dinged up state, so they make them "hard" and they want all the lube in the groove when they get to the end user too. They don't want a brown truck parked in a hot Arizona parking lot for 2 days to have all the lube slouch off. Used to be that happened. So now they use hard, crayon type lubes. And of course a flashy color adds to sales! Truth is, most of the softer lubes work fine up into the 2K fps range in many guns, some work beyond that in the right combination. I'd suggest you do your research, ask question of people you trust with real world experience and try it and see. What commercial caster do is seldom needed, wanted or required for home based casters.