If you are adjusting your Bullet Seater die that way, I don't think it is necessary to adjust the die all the way down. I don't know if the redding die has a crimp function in it, but if it does, you may be crimping the case a lot. I think I just adjusted mine down with the case in the shell holder, until it just starts to show resistance, and then just use the bullet seater stem for the final seating depth.
I don't know if that would cause your problems, however.
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