One of my friends just picked up a hammerless H&H 12 bore Paradox. With it is the sizer, crimping tool, and bullet mold. He is not a bullet caster so the job fell to me to help him out. Any thoughts on what the correct bullet hardness should be? I see references to "hardened" but no specifics. Seyfried's article in Handloader suggests a 20/1 alloy and I'll likely go with that unless other wisdom prevails. I have plenty of pure lead, wheel weights and linotype as well as several pounds of tin. Thanks in advance.

Mart