I learned, early on, that with the extra manipulation requited with Cramer style hollow point molds, that the two cavity molds work better for me. At my age, I can easily cast 20 lbs. of bullets at one setting when using the two cavity molds hollow point molds, but four cavity Cramer stye are too heavy for ME. I tire out too easily. However, Mihec's are made SO well and I always choose a multi-cavity when using solid bullets.
Further, I find that mold release on the tips of the hollow point pins helps greatly with release. I also lightly lubricate the "slider's" and loosen the "slider's" so they self alighn. Those little things can make a big difference in satisfaction and production.
So, for standard molds, in aluminum, I can easily use six cavity molds for great production, Brass or Iron for solid bullets, four cavity work best for me. Under four, production suffers, over four, are just too heavy for me. I have to laugh a bit, as when I was younger, they didn't make a mold that had too many cavities for me (even the old H&G iron ten cavity molds). But, instead of feeling sorry for myself, I rejoice in the fact that I am still casting a reloading (and shooting) at 85! (In minutes, I am leavin for the range as we talk...
FWIW
Dale53