Hard to decap.

[SeaHound1]

I picked up some of this 5.56 brass at the range. It's very hard to deprime. It is tougher than crimped primers.

What is the red material, is it some sort of glue? The brass is marked 5.56 x 45 and
IK 13.

Second question, if I can resize it in my 223 RCBS dies can I consider it 223 brass?

M[emoji55]

Keep yer powder dry.
SeaHound1 ♧

[highpower790]

The red Stuff is a primer sealant,and IM betting that brass is primer crimped, and yes the 223/556 is the same.

[baih777]

this is where the Lee universal decapping die comes in handy. and a couple of extra decapping pins.

[stilly]

STOP!

Get a small flashlight and make sure that those are NOT berdan primed.

Look inside the shell casing and confirm that you see two little holes or one large hole in the middle.

Primers can get decapped with little to no issue on most if not all presses. When I broke a decapping pin on my hand press, I looked down into the brass case and discovered that it was berdan and not boxer primed...

If it is a single hole, check your decapping rod. My guess is that this is that Yugo garbage that people have bought and the problem was that it had tiny flash holes. SO, the next thing to do would be to either make your decapping rod smaller, or try a different decapping rod like the Lee universal decapper.

If this is the problem, check those flash holes against other cases that you have and if they are indeed smaller then you really should get a flash hole reamer and make them a little bigger than what they are, not too big, but at least uniform size.

I came across a few of these once or twice and although I had no issues with my decapper, Other people have asked about them in the past and had issues with RCBS presses and decapping rods, well, RCBS users using RCBS FL sizing dies had issues anyways.

If you want to use it again, be sure to get the lyman flash hole reamer or uniform sizing thingamajigger and you should be GTG.

[TKM]

Stilly is right.

I found out why I got such a good deal on a bunch of foreign 50BMG with my flashlight. Doh!

[Enfield47]

Yep, I think Stilly is right that it is Yugo brass with small flash holes. Try using the Lee decapping die, the pin is small enough it should work better than your resizing die's pin. You should also consider enlarging the flash hole with a reamer then you'll be good to go.