Mornin' everyone. I'm preparing some .45-70 loads using Cast Performance 405 gr LWNGC bullets. The seater plug that came with my RCBS dies are RN configuration. I called RCBS and talked to a customer service rep (didn't get his name), and told him what I needed. Fully expecting to pay for a seater plug, he said that he'd ship me a "WC" seater plug at no charge. (Thanks RCBS, by the way!!) Anyway. . . I get the new seater plug, and it's not 'right' for this CP bullet. The face (proper name) of the bullet is .378" across, and the "WC" seater plug is a lot smaller. The new seater plug is perfect for the Speer 350 gr HotCor FP bullets that I have, so, I'm not going to modify it. What I've done is to use some "JB Weld" to fill in the RN cavity of the seater plug. It looks pretty good, right now. No drips, runs, errors, sofar, plus the end of the seater plug is flat (as it should be). The "JB Weld" should be cured (24 hours) tonight, but, I won't get to try it out until tomorrow evening. Has anyone tried this??? Wanna kill these ads? We can help!