I've been advised to use the 98% lead 2% tin to help with fill for my cap n ball boolits.
I think Kaido casts and sells his cap n ball boolits that are 7-9 BHN.
Use what you want. I don't have a problem with fill. My big bullets get frosted but that doesn't bother me. Never used a Kaido, never will.
In a .44 cal would someone use .451 or .454? Sorry for all of the novice questions guys but this is really sounding like an interesting and ADDICTIVE hobby.
Definitely .454, you might get away with a .451 in some Pietta's but I have seen them move under recoil.