I have about 1/2 dozen MP molds, most of them cast like a dream but that particular mold was a bugger. The issue wasn't the bullets not dropping from the pins due to taper, the issue was the criticality of the temperature. I tried adding tin to help fill out, different temps, different cadence and just couldn't get the balance between hot enough to fill out and sufficient cool day to keep the noses from breaking off.

Hp molds are neat, and in many cases they can cast as nicely as a conventional flat point mold. But to suggest them to an inexperienced caster or to say they are the best for all applications is IMHO getting a bit carried away with what I consider more of a novelty or fad than a necessity.