A hard cast bullet may not be your best choice in the .44 WCF, it has been killing critters, both 2 legged and 4 legged, for 135yrs. with fairly soft lead bullets. Soft lead bullets tend to fit the cyl. and barrel better on ignition, harder bullets don't obturate (is that a word?), allowing hot gases to "blow by", and cause leading in your cyl./barrel. You may have to experiment as some chambers won't allow the round to enter fully if the bullet is too big, that's why alot of folks use the .427" bullets.