Home Forums Reloading Big Game Rifles FLS die leaving ring at bottom of case?

Use post image or if you have to use 24hourcampfire method open your picture with paint and resize.

Post image is much easier and better than the 24hourcampfire method - I always use post image now.

trying photo It's a little dark.

So you are resizing all once fired brass? Not new?

If the picture is of a once fired piece, the ring is the pressure ring formed at the bottom of a fired case, and IME, cases fired in different chambers of different rifles, and resized, could show this "ring". If you section a piece of brass, you will see it just in front of the case head. You will also see where the case has streached to fit the chamber it was fired in. A potential problem of case head seperation in YOUR rifle.

Be careful if this is indeed once fired stuff.

I`ve never seen this with "new" brass and a new die, when ironing out kinks in the new stuff, but maybe I`ve been lucky over the years.

Good Luck.

How many times has that piece of brass been fired?

I'm pretty sure it was fired once. I don't have any brass that was fired mor tha twice. None of the rings can be felt by my thumbnail. The Remington brass came out without any bad rings. Most of them are pretty good looking.

Any idea if both were fired in the same rifle?

4 different pieces of brass, 4 different cartridges, 30-06, 6mm Remington, 204 Ruger and 22-250. Obviously fired in different guns.

I think it's just the transition of your case head to the walls of the brass.









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Are you familiar with the bent paperclip check for incipient head separation?

I've never heard of the paper clip test?

You could take the worst one and cut the brass off about 1/2" above the ring and see if the ring is visible inside of the brass.

Or toss it if history is unknown. Do you still have the rifle this particular bradd was fired in?

It's easy enough to just bend a paperclip.

Thanks!

All of the brass was just sitting for 3 to 4 years in plastic ziploc bags. It was also primed but since sitting so long I wanted to resize/ deprive. Just looking into the cases I could tell they were new primed cases. Also after depriming the pockets looked brand new. I'm going to find a paper clip and try testing with it.

Why haven't you taken any measurements before and after? Calipers will get you close.

Four rifles, four different cartridges, four different dies and all once or twice fired.To me, it looks like the normal expansion of the case. When the cartridge is fired the pressure expands the body of the case to fit the chamber but the brass is too thick at the very bottom of the case to expand it that much. Then when you size the case, the die only contacts that portion of the case that has expanded out to the chamber walls.

If you look very carefully at a fired case before you resize it, you can see that ring on a fired case too. It just hasn’t been burnished bright by contact with walls of the dies and the little tarnish on the cases makes it more apparent.

Unless those primed cases have been in pretty adverse conditions, there’s no need to deprime and size again.

Just haven't got around to it yet. I'm not going to load cases until I check chamber fit when new gun gets here. I'll take some measurements although I don't have any unfired brass to compare with. I'll have to look up saami specs.

Saami specs are .002 tolerance before and after is what matters. Without measuring everything else is just a guess.
What your cases are getting sized back to is what I would be concerned about first.
Dies should size back .002-.0025 at the .200 line, stranger things have happened with dies.
Your brass should be around .469 at the .200 line after sizing

Measure .200 up from the case and try to mark that spot, then measure with the thinnest part of your calipers and see what you get.
I would also measure where the shiny ring is also if its not on the .200 line

0.466- 0.467 is what I am getting where the rings are at.Its the same at the .200 area.