With great fortune, I just picked up a new side gate Henry Big Boy 357. Now it's time to feed it!
The problem I've encountered is that I'm shaving lead during the seating process with a new RCBS die set. What seems to be happening is that the seating die removes all my flaring right as it enters the die. What starts as a very comfortable 0.390" brass OD gets taken down to 0.381" the moment it enters the die and shaves lead even when seating and crimping in two separate steps.
I've found that if I deburr the inside of the case mouth before seating, I get a lot less shaving. However it'll still shave a side if I wasn't centered very well.
I've got to think it shouldn't be this touchy to load these things! Any ideas what I'm missing or probably doing wrong?
Measurements are with calipers, so +/- a little. And the current boolits in use are Lee 140 gr SWC luberesized to 0.357, and Lee 200gr FN power coated and also sized to 0.357.
Thanks for any help!