Looks like too much shamfer on the cases making the edge very thin ,over crimping as well, die shouldn't be near shell holder.
Looks like too much shamfer on the cases making the edge very thin ,over crimping as well, die shouldn't be near shell holder.
Just FYI, the pictures posted by Iron369 look nothing like the problem I or the OP are having. We are talking about a brass ring even thinner than a human hair...microscopic.
Crimp a little less and make sure to chamfer the inside/outside of the case...
One thing - those little 'hairs' if still attached can cut right through you skin and you'll bleed like a stuck pig... I had one do that many years ago when first started loading 44 mag and I saw the hair and pulled it - that little cut would not stop bleeding!
WWG1WGA
I was doing a very minimal de-burring, trying not to cut an actual chamfers on either side of the case mouth, trying to keep the brass near original thickness to retain strength and to reduce mouth splitting.
My Redding die makes a roll crimp and I was just crimping enough to get the case mouth to be flush with the edge of top drive band so the bullet if pushed back would be on the wide flat edge of the case mouth rather than a thinned out chamfered area.
I have a Redding Profile crimp die, used it in the past on Starline 45 Colt brass but didn’t like that it permanently embossed a ring about .018” wide all around the case mouth like a stair step.
So now I apply a classic roll crimp.
I have a LEE collet style crimp die haven’t used it yet because I’ve read it could push on the slope of the crimp groove and push the bullet deeper into the case.
I thought it might make it difficult to hit the cartridge recipe COL.
Last edited by greenjoytj; 09-18-2019 at 08:12 AM. Reason: Spelling
When troubleshooting a problem like this, closely inspect each round before and after each step, including cleaning and deburring. Often when looking for a problem's reasons, I will clean my brass deburr and closely visually inspect. Then after each proceeding step, again closely inspect. Visually if there is a problem like this thread, and I'll thoroughly measure the entire round when there is a fit problem. Finding out when the problem occurs, or presents itself is essential to fixing the problem..
My Anchor is holding fast!
I have not been able to measure any bullet movement while crimping with the Lee collet crimp die. The same cannot be said for the standard roll crimp, which often seats the bullet deeper if it wasn't seated initially just right for the crimp groove. Small variations in brass length effect the crimp quality, and cartridge OAL with a standard roll crimp. The collet crimp die is not effected by this in the slightest.
why do any of you deburr pistol brass? I have never seen the need. Plus is that some of the brass that has that little sleeve inside?
Usually one rotation of the inside and outside debur tool is enough to debur a case. More than that will thin the brass...
I resize/debur 44 mag but no other pistol brass...
WWG1WGA
Umm, to prevent this problem. I agree that the crimp is too firm but cannot agree with the suggestions to just iron out the flare. In a revolver or rifle the crimp is necessary to prevent boolit setback or extraction under recoil as well as to promote consistent ignition.
Sometimes life taps you on the shoulder and reminds you it's a one way street. Jim Morris
mto7464:
Every pice of my revolver brass come with a burr inside the case mouth. Caused by the factory tube cutter when its cut to near correct length.
Factory outside edge is usually good but if the case requires trimming to length, then both sides will need de-burring.
Also if the cases are wet tumbler cleaned with SS pins there is nothing to cushion the brass from clunking rims against case mouths, so the case mouth can acquire some small dings that require smoothing out.
Last edited by greenjoytj; 09-19-2019 at 08:22 AM. Reason: Spelling
I'd had that happen with new die sets for a short while until they get used a bit.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |