The Firing Line Forums - View Single Post - Do I really need .380 dies if I have 9MM?

wrm · May 4, 2013, 03:25 PM

While the 38 is just a short 357, the 9mm short (380 ACP) shares pretty much only the bullet diameter with the 9mm P.

9mm P is a tapered case, so the case head is larger than that of the 380 ACP. This means you need two different sizing dies. You could potentially use the same neck expander and bullet seating dies I guess... havn't tried it though.

May 4, 2013, 03:25 PM	#8
wrm Member Join Date: August 11, 2010 Location: Cape Town, South Africa Posts: 52	While the 38 is just a short 357, the 9mm short (380 ACP) shares pretty much only the bullet diameter with the 9mm P. 9mm P is a tapered case, so the case head is larger than that of the 380 ACP. This means you need two different sizing dies. You could potentially use the same neck expander and bullet seating dies I guess... havn't tried it though.