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Resizing .300wm in RCBS die problem

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Minuteman
Dec 19, 2006
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Kentucky
I've been resizing Winchester .300wm brass in RCBS dies for a little while now but since I've switched to a Hornady press, I find that the shoulder on my cases is getting rounded off when I resize. Any ideas what is causing this? I'll see if I can get a couple pics today but basically instead of a sharp corner around the shoulder it's getting rounded off.

Thanks in advance!

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