tiny dimple on case

G

green_MTman

New member
i was at the range a few days ago and some of my fired shells had tiny dimples on them.maybe a half mm deep and also a bit of scratching on the neck,very very tiny scratching.

i have never seen this before in thousands of reloaded ammo.also brass was new nosler brass,first firing.

1.is this a pressure issue

2.i think the answer is that it was a windy day and a spec of sand got in the chamber and fire formed the dimple,i cant know for sure.

3.are those shells reloadable regardless of what formed the dimple

4.has the chamber been damaged,do i need to gunsmith it
 
its a custom 6.5-55 with krieger barrel and savage reciever.

it could have been on all of them,i looked the hardest at the primer and pocket and neck for pressure signs.i looked over the shells pretty good and i usually dont miss anything.but it was the last group of three that i noticed the dimple.

upon looking inside my fired brass container i saw a few more on top.wind could have put a sand grain in the chamber because i leave action open when going down range to switch targets
 
The case is embeddable, a grain of anything should have become part of the case unless the particle was crushed. Then there is lube, who knows? logic would lead most to believe the lube would spread evenly, under pressure the lube could forms small pools, because lube is solid and can not be compressed dimples could form.

Chambers like dies, I clean both with a towel on a dowel, I use towels that are white. Then is nothing like knowing when I am finished.

F. Guffey
 
could it be lube?

it was the first time firing after a gunsmith did some work to increase the freebore.the spent shells were a bit greasy
 
Lube is what it sounds like. I would do a full length size on the cases for this round of reloading and keep that chamber clean.
 
ill have to run a dry patch through the chamber.you would think because i fired 12 rounds that day.usually 2 rounds takes care of any oil in the chamber or barrel.
even the last round had quite a bit of what felt like wd 40.this gunsmith always has greasy hands though
 
ill have to run a dry patch through the chamber.you would think because i fired 12 rounds that day.usually 2 rounds takes care of any oil in the chamber or barrel.
even the last round had quite a bit of what felt like wd 40.this gunsmith always has greasy hands though
Click to expand...

you would think
Click to expand...

No I would not. What do I think? I think firing a round is a greasy, oily chamber is a bad habit. I have philosophical difference with some segments of reloading. There is a large group that insist greasing your bullets/cases/chambers prevents stretch between the case head and case body. we differ because I believe they should do a better job of forming/sizing cases when off setting the length of the chamber. It is about this time I get accused of getting all cryptic on them even though it is about nothing more than what one thinks.

F. Guffey
 
i use very very little oil after i clean gun and i always remove lube after resizing.

it was the gunsmith that left the chamber to oily,i should have dry patched the barrel after shaking his WD40 soaked hands but i assumed the gunsmith knew better than to leave a oily chamber.

is the grease the problem you think.is this issue settled.i cant see pressure being an issue because the primers were normal.there was no evidence of sand on the shells
 
Well we all know the dimples we get when we overlube before FL sizing, I can only assume oil in the chamber could have same effect. Is the issue solved? I dunno, clean it out and go shoot it...
 
I never assume someone else cleaned all the oil they used out of the barrel. Only takes a few seconds to run a dry patch through the barrel and chamber.
 
It sounds to me like a grain of powder that wasn't burnt from a case. When the case was fired and removed from the chamber a grain of powder stayed in the chamber causing a indentation in the next case that was fired. I have seen this with my cases. The case will fireform and be gone after reloading and firing. I don't believe this is a problem. Just take a look into the chamber and give it a little blow to remove it. It's the same thing you see in a shot guns chamber before cleaning.
 
I use a towel on a dowel. I prefer white, white can not be beat when determining the work is done.

Barrels, I make barrel cleaners, something like bore snakes. Difference? I find it impossible to stick something into a barrel that is difficult to remove.

F. Guffey
 
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