Hello Gents
I reload for a couple of 38"/357" lever rifles and have been offered a supply of copper jacket 158gn bullets which have the jacket "rolled" at the bullet base and the lead core left exposed at a diameter of approx .22".
Normally I would work up a 158gn load to maybe 15gn of AR2205 but I have a vague recollection of reading a statement to the effect that lead fouling can be/is generated by vaporization of lead from the bullet base.
I am particularly thinking of why folks use gas checks on cast bullets for faster loads.
Most grateful for any input.