Quote Originally Posted by villiers View Post
Looks like that mucky load of old bullets would cause a thick layer of scum to form and impurities would almost certainly be responsible for the cavities.
Actually, after a brief run wet in the vibratory case cleaning machine and a good hosing off they cast melt and cast quite nicely. Did a run of "155gc" .357 mag bullets using that very same bucket load Saturday. about 90% of the bullets were in a max spread of 1.2 grains. Good fill out but had some oversize and overweight for the nominal diameter. As cast they were about 0.362" at 164.4gr average with 388 initial "keepers".

The .43 Spanish bullets were a mix of "pure" lead with some linotype added.