The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools
Old October 11, 1999, 06:41 PM   #1
45 Fan
Member
 
Join Date: August 14, 1999
Posts: 27
Hello to all:
I am new to reloading for the .40 caliber and would like to know what the proper taper crimp measurements should be at the case mouth? Thanks in advance to all who reply....45 Fan
45 Fan is offline  
Old October 12, 1999, 06:31 AM   #2
Stephen A. Camp
Staff In Memoriam
 
Join Date: April 16, 1999
Posts: 2,570
Hello! I don't have the "dimensions," but I taper crimp in 9mm, .40, and .45ACP. I simply apply enough crimp to remove the last indications of flare on the case mouth and then add just enough to ever so slightly turn the case mouth inward. I suspect I'm leaving slightly more than half of the wall thickness
available for headspacing although many do opine that the extractor's holding the case back from the end of the chamber. Best.
Stephen A. Camp is offline  
Old October 12, 1999, 12:13 PM   #3
LongDuck
Member
 
Join Date: September 15, 1999
Posts: 97
I use a similar crimp technique for .45 and 9mm, with my Lee carbide dies, I set the crimp so that the case will easily slide into my Midway cartridge gauge (min), and also so that the outter edge of the case mouth is ever-so-slightly shiny from being turned in by the die. This produces a firm crimp that prevents bullet set-back (important for your .40's) and also ensures reliable feeding across the feed ramp for my Glock 19's and USP45.

This method was reached after doing excessive crimp and then not-enough crimp during the course of working up loads. Take your time and try several to see what works best. IME, too much is better than not-enough (within reason), but getting it perfect should be your goal. Best wishes,
LongDuck is offline  
Old October 12, 1999, 04:20 PM   #4
WESHOOT2
Senior Member
 
Join Date: February 20, 1999
Location: home on the range; Vermont (Caspian country)
Posts: 14,139
Try .420-.423". Suggest using a Lee Carbide Factory Crimp die.

------------------
"All my ammo is factory ammo"

WESHOOT2 is offline  
Old October 12, 1999, 10:33 PM   #5
Fred
Senior Member
 
Join Date: November 3, 1998
Location: CA
Posts: 465
Ditto using a Lee Factory Crimp die. It has solved problems for me, like bullet setback and case bulge from .40 brass in Glocks. I don't leave home without it!

------------------
Regards - AZFred


Fred is offline  
Old October 14, 1999, 09:16 PM   #6
Trooper
Member
 
Join Date: July 23, 1999
Posts: 26
Ditto again on the Lee Factory Crimp Die. Works great and a great price, too.
Trooper is offline  
Old October 17, 1999, 10:56 PM   #7
TheOtherMikey
Senior Member
 
Join Date: October 16, 1999
Location: Surprise, Arizona, USA
Posts: 171
Ditto again, I wouldn't load any auto pistol rounds without using a Lee taper crimp die.
For sizing, I insert a factory loaded round and tighten down the die until it is real snug, remove the round and give the die another quarter turn. I also check with my caliper. I haven't tried using a chambering guage as of yet.

Hope this helps, Mikey
TheOtherMikey is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.09850 seconds with 9 queries