Xtreme 9 mm 124 gr RNCB - Page 3 - MP-Pistol Forum

Xtreme 9 mm 124 gr RNCB

This is a discussion on Xtreme 9 mm 124 gr RNCB within the MP Reloading forums, part of the Smith & Wesson MP Forum category; Originally Posted by noylj I have no idea how a undersized sizing die can go down further on a case than a standard sizing die. ...


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Old April 17th, 2017, 09:10 AM   #31
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Quote:
Originally Posted by noylj View Post
I have no idea how a undersized sizing die can go down further on a case than a standard sizing die. The issue is that a sizing die, of any type, can simply push the bulge down and form a ridge that prevents chambering. Thus, Bulge Busting is the best technique.
However, for Bulge Busting 9x19 and 9x21 cases, I use the Lee 9mm MAK FCD. Works great.
Trust me , the undersized die does go all the way over the case. You can set either die to touch the shellholder and get full stroke on the press.

The 9mm resizing die is tapered from mouth to base. The part of the die that covers the solid portion of the case is the same on each die. The part that resizes the thinner part of the case is smaller on the undersize die. I hope this is makes sense to you, my explanations sometime leave a lot of confusion but make perfect sense to me.
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