As the crown's the same for all shots fired, but one batch of ammo shoots good and the other bad, it's no fault of the crown. The crown affects all bullets the same. If the crown was really bad, all ammo would shoot that way, too.
I'd try another load. Moly coated bullets improve accuracy very little, if at all.
And shoot more shots per group; ten's the absolute minimum for reliable data. 3-shot groups are only 50% reliable.