Welcome to M1911.ORG
The M1911 Pistols Organization Forums Site


John needs your help
Please read this message.


Sponsors Panel
If you intend to buy something from the companies advertising above, or near the bottom of our pages, please use their banners in our sites. Whatever you buy from them, using those banners, gives us a small commission, which helps us keep these sites alive. You still pay the normal price, our commission comes from their profit, so you have nothing to lose, while we have something to gain. Your help is appreciated.
If you want to become a sponsor and see your banner in the above panel, click here to contact us.

Page 4 of 4 FirstFirst 1234
Results 31 to 35 of 35

Thread: Why I now crimp

THREAD CLOSED
This is an old thread. You can't post a reply in it. It is left here for historical reasons.Why don't you create a new thread instead?
  1. #31
    Join Date
    13th November 2011
    Posts
    173
    Posts liked by others
    2
    Quote Originally Posted by Robert Segars View Post
    I have vacillated between crimping and not crimping all of my 45ACP loads for some time now. This past Saturday I was at the range and had the worst fail to feed I have experienced. The cartridge was approximately 2/3 the way into the chamber and solidly lodged, the extractor had a death grip on the case, the hammer was cocked and nothing would move. The gun is an old Colt 1911A1. The proximity of the firing pin to the primer was much to close for comfort.
    I ended up being able to remove the slide from the frame, then removing the firing pin and prying the cartridge out of the chamber. I separated this round from the rest of the reloads, reassembled the pistol and continued my session.
    On Sunday morning using this same gun barrel I attempted to seat this round by hand and of course it would not chamber.
    I found that the case mouth of this cartridge measured .480. I crimped this cartridge at .001 each time and discovered that at .4735 dia the round would seat with gentle pressure at .4725 the round passed the kerplunk test.
    How this one round out of the thousands I have reloaded ended up with a case mouth dia of .480 I have no idea.
    I now stand squarely in the view that for me all reloads in the future will be crimped to at least .471 or .472.
    I post this in the hopes it may be useful information for someone.
    If I could retitle this thread, I would say. THE DEVIL IS IN THE DETAILS. I finished shooting all the reloads that prompted this post, began the process of resizing and decapping a few hundred rounds. I still had the nasty feeling that I may repeat some earlier mistake that may have led me to an incorrect diagnosis.
    This time I carefully reset my sizing die to reach as much of the full length of the case as possible, in fact it is now set to where the old RCBS Rockchucker Press will just cam over at the end of the stroke.
    Measuring as many points of the case OD as possible ,the largest OD I can find now measures .4735-.474. Hopefully this die adjustment will eliminate the problem. I think Kenny Lee nailed the problem early some of my cases were not getting resized. I always tell my kids "we learn from our mistakes" my oldest son always replies, "right dad but really smart people learn from other peoples mistakes". I think the boy may have taken after his mom.

  2. #32
    Join Date
    27th July 2008
    Location
    Minnesota
    Posts
    255
    Posts liked by others
    0
    The other option, not mentioned in the thread, would be to drop your finished rounds in a L.E. Wilson max case gauge to check all critical maximum SAAMI cartridge dimensions - mouth diameter, base diameter, rim thickness and diameter, case and overall length and bullet diameter.

  3. #33
    Join Date
    15th April 2010
    Posts
    2
    Posts liked by others
    0
    This is a great thread and confirms several things I've observed myself about the LFCD post sizing ring and brass thickness.

    I saved the graphics for future reference. All good stuff... thanks for posting it.

  4. #34
    Join Date
    21st January 2006
    Location
    ohio
    Posts
    185
    Posts liked by others
    1
    Lee factory crimp die!

  5. #35
    Join Date
    25th September 2006
    Location
    South of Lake Superior
    Posts
    14,085
    Posts liked by others
    127
    Quote Originally Posted by jeep View Post
    Lee factory crimp die!
    And what about the Lee Carbide Factory Crimp Die?
    When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. [Lord Kelvin]

Page 4 of 4 FirstFirst 1234

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  



Sponsors Panel
If you intend to buy something from Brownells, please use their banners above. Whatever you buy from them, gives us a small commission, which helps us keep these sites alive. You still pay the normal price, our commission comes from their profit, so you have nothing to lose, while we have something to gain. Your help is appreciated.
If you want to become a sponsor and see your banner in the above panel, click here to contact us.

Non-gun-related supporters.
Thank you for visiting our supporters.