crimping 9mm

doggs86 · April 16, 2010, 11:09 AM

is it that important?

That'll Do · April 16, 2010, 12:52 PM

Any semiauto handgun cartridge that headspaces on the case mouth should be taper crimped. So yes, it is important.

Dave R · April 16, 2010, 01:48 PM

And any seater die for 9mm (that I know of) will do the taper crimp thing. Follow the directions that came with the die. And don't crimp any more than necessary to take the flare out. Over-crimping is bad juju.

rjrivero · April 16, 2010, 03:38 PM

@DaveR

Dillon seating dies do not have a taper crimp function. They include a taper crimp dedicated die in their 3 die sets.

dlb435 · April 16, 2010, 07:17 PM

I alway follow up with a crimp die. I'm using the Lee factory crimp die with an RCBS 9mm die set.

April 16, 2010, 11:09 AM	#1
doggs86 Junior Member Join Date: April 16, 2010 Posts: 2	crimping 9mm is it that important?

April 16, 2010, 01:48 PM	#3
Dave R Senior Member Join Date: January 7, 2000 Location: Idaho Posts: 6,073	And any seater die for 9mm (that I know of) will do the taper crimp thing. Follow the directions that came with the die. And don't crimp any more than necessary to take the flare out. Over-crimping is bad juju. __________________ I am Pro-Rights (on gun issues).

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April 16, 2010, 12:52 PM	#2
That'll Do Senior Member Join Date: October 25, 2008 Location: Pittsburgh, PA Posts: 547	Any semiauto handgun cartridge that headspaces on the case mouth should be taper crimped. So yes, it is important.

April 16, 2010, 03:38 PM	#4
rjrivero Senior Member Join Date: November 17, 2008 Location: NW Ohio Posts: 1,399	@DaveR Dillon seating dies do not have a taper crimp function. They include a taper crimp dedicated die in their 3 die sets.

April 16, 2010, 07:17 PM	#5
dlb435 Senior Member Join Date: January 26, 2009 Posts: 654	I alway follow up with a crimp die. I'm using the Lee factory crimp die with an RCBS 9mm die set.