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Old August 15, 2012, 02:32 PM   #1
rebs
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223 case bulge ?

I loaded some 223 using dog town 55 gr soft point flat base bullets and a few came out with a bulge right at the shoulder where the pen is pointing, is this from the flat base bullet pressing the case before the bullet slide in the case ? Any other cause ?
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Old August 15, 2012, 04:06 PM   #2
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I'm going to guess that you've got the body of the seating die too far down.
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Old August 15, 2012, 04:12 PM   #3
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Case length is too long, those are over-crimped. Trim them all to the same over-all-case-length, then set the crimp to one, they'll all crimp the same.
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Old August 15, 2012, 04:12 PM   #4
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Re-adjust the seating die. You are causing a set back, shoving the neck into the shoulder. Other than not being able to chamber, they are ok

Enjoy and be safe,

OSOK
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Old August 15, 2012, 05:12 PM   #5
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If you didn't chamfer the mouth of the case, you could have hung the flat base on the case rim and caused the problem. The other answers are all good ones, and are more likely to have caused the bulge, but nobody answered your specific question.
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Old August 16, 2012, 06:52 PM   #6
m&p45acp10+1
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That picture screams of too much crimp. As has been said back the seating die off some. Follow the die makers instructions for seating without crimping. If you still wish to crimp then seat, and crimp in seperate steps. That will more likely than not solve the problem.
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Old August 17, 2012, 12:15 PM   #7
rebs
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I loaded 50 rounds with no change idie adjustment and only 3 cases came out this way. Is this possible because of loading flat base bullets and some didn't enter the case mouth right ?
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Old August 17, 2012, 12:18 PM   #8
rebs
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Quote:
That picture screams of too much crimp. As has been said back the seating die off some. Follow the die makers instructions for seating without crimping. If you still wish to crimp then seat, and crimp in seperate steps. That will more likely than not solve the problem.
I am not crimping at all. I know the bullets have a crimp groove but I seat only to the middle of the groove. Not using any crimp.
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Old August 17, 2012, 01:39 PM   #9
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If your bullet was catching on the neck it would crush the neck where it was catching, not nearly uniform around the whole body.
If the case looks like that after seating and not before, I'd virtually guarantee that the seating die is adjusted far too low in the press and it's crushing the case.

Simple solution. Unscrew the seating plug almost all the way. Remove the die from the press. Insert a sized case and raise the ram. Screw the die down until it contacts the case. Unscrew the die 2 turns and tighten the lock ring.

Now go back trying to seat bullets and adjusting the seating stem until you get the length you want. The cases won't be crushed anymore.

Last edited by Brian Pfleuger; August 17, 2012 at 03:51 PM. Reason: Correct the spell correct.
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Old August 17, 2012, 02:47 PM   #10
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Quote:
I am not crimping at all. I know the bullets have a crimp groove but I seat only to the middle of the groove. Not using any crimp.
Yes you are! Because as I said, you have a few cases that are longer, those ran into the crimp ring in the die. Simple to solve. 1, trim all the cases to the same length AFTER sizing. 2, back the die OUT/UP/AWAY from the the shell holder one turn. Now adjust the seater back down to seat to whatever length you want.
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Old August 17, 2012, 02:55 PM   #11
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I will adjust the seating die like suggested.
Thank you for the replies I appreciate it
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Old August 18, 2012, 03:37 PM   #12
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I agree with the others that your seating die needing adjusted as to a possible cause for bulged shoulders but...From where I sit it does appear that the bullet has contacted the lip and pushed it down, there is a noticeable dip in the case mouth just above the shoulder bulge. So it is quite possible that had something to do with the bulging.
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