I'm just getting into casting and I have 8 Lee 6 cavity molds which seem to work really well once I get the molds at the correct temp. I sometimes get a very thin strip of lead running the length of the bullet sometimes up to the tip/point - this is b/c the mold might not have been clamped closed as well as it could be. The bullets are still the correct size though, so IDK how this "flashing" leaks out of the cavity.
I also use a bullet sizing die for all my rounds to make sure they are the exact diameter needed for each gun. I'm doing .356" now for 9mm loads. I also noticed that I get some flashing around the base which is a very thin ring of lead that I can usually scrape off with my finger nail but when I'm working with 2,000-3,000 rounds, it takes a lot of time to do these individually. So I'm wondering if there is a way I can deal with all this flashing at once, maybe by tumbling or vibrating after running through the sizing die.?
I'm planning on powder coating all the bullets so IDK if that changes anything. I think it makes it even more important to remove the flashing if I'm going to be powder coating them though.
Just as a note, all these bullets are just for range/target shooting so they don't need to be super precise and accurate (though Ideally I'd like them close as possible). If anyone has any suggestions I'd really appreciate it!