Dented case mouth


PDA






siglite
November 25, 2007, 05:35 PM
I tried to search, but the search function was returning a blank page... So I'm sorry if this has been asked and answered.

My 556 REALLY ejects cases quite a ways. I mean, it really slings them. It's denting the case mouth on every casing it ejects. Having to buy new brass for every lot will add to my cost quite a bit. Is there a safe way to put those case-mouths back into round?

If you enjoyed reading about "Dented case mouth" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
zxcvbob
November 25, 2007, 05:39 PM
How bad are the dents? When I pick up dented pistol cases, I just size them and load them and the dents get ironed out along the way. If it's a really bad dent and you're afraid it might crease, use an expanding die first, then resize, then expand it again.

First I would try ignoring the dents and see if they go away.

The Bushmaster
November 25, 2007, 05:49 PM
A photo would help, but it sounds like what zxcvbob said. Resize them and load'em. If they are that dented in at the mouth use a tapered drift punch to open them up so the die can deal with them. Even a wooden dowel would do the job...

ReloaderFred
November 25, 2007, 06:50 PM
I made a tool just for that problem out of the hardened steel core of a .30 caliber armor piercing bullet. I drilled a hole of the right diameter in a steel block and used a set screw to hold it in place, with the pointed end up. I just push the dented case mouth down on the steel core and it straightens it right up.

For .30 caliber case mouths, I drilled another hole in the block to accept the whole armor piercing bullet. It's just right for fixing those dented .30 caliber case mouths.

For larger calibers, I used the core from a .50 BMG armor piercing bullet. The whole rig only takes up about 3" x 3" on my bench, with the steel block being about 1.5" thick.

Hope this helps.

Fred

siglite
November 25, 2007, 07:40 PM
Hmm... if my deburring tool didn't have the edges on it, it'd be perfect for straightening out those dents. I'll look around for something conical that I can secure to the bench for that. If I don't find some solution, I'm going to be wasting a lot of otherwise perfectly good brass.

zxcvbob
November 25, 2007, 08:10 PM
Try a nail-set punch. You don't need to fasten it to the bench.

86thecat
November 27, 2007, 04:25 AM
Some velcro (fuzzy side) on the upper where the mouth is hitting or on the bulge behind the ejection port may stop most of the denting. Try 6 or so thicknesses of masking tape temporarily to see.

lee n. field
November 27, 2007, 09:42 AM
My 556 REALLY ejects cases quite a ways.

Mini-14 Ranch, or Saiga/AK?

If you enjoyed reading about "Dented case mouth" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!