DE PRIMING PMC BRASS PROBs.

[husker]

i just bought new LEE dies & yes they knock the old primer out . But are leaving a ring still in the brass. & i cant get a new primer in the PMC BRASS
Its head stamped PMC 223 REM Not sure what im doing wrong.

 

[ReloaderFred]

You're not doing anything wrong. Some PMC primers come apart in the primer pocket. You'll notice that the primer residue is probably white in color on those that are coming apart. I don't know what the priming compound is that they're using, but it sometimes glues the primers in the pockets.

Use what you can salvage and recycle the ones you can't.

Hope this helps.

Fred

 

[husker]

Thanks. that sucks i have a ton of it to de prime. Do you think baking it in an oven might break down the glue. Any way im going to try it & see what happens. Oven 450 for an hour. hope it helps

 

[Winston_Smith]

Sounds like you have a primer crimp that needs to be removed before you can prime. Depending how many you have to do, you may to go get a Dillon super swage. If you only have a few, there are hand tools that can be used to remove the crimp.

 

[rcmodel]

DO NOT bake the cases in the oven at 450 degrees.

You will anneal the case heads, rendering them soft and dangerous!

rc

 

[TimRB]

450 degrees F is not even approximately hot enough to anneal cartridge brass.

http://www.substech.com/dokuwiki/doku.php?id=wrought_copper_alloy_c26000_cartridge_brass

That said I doubt that heating the brass is the right thing to do to solve this problem. If there is some sort of adhesive still in the primer pocket that interferes with seating a new primer, possibly it could be removed with a primer pocket uniformer or maybe a solvent.

Tim

 

[snuffy]

I just bought new LEE dies & yes they knock the old primer out . But are leaving a ring still in the brass. & i cant get a new primer in the PMC BRASS
Its head stamped PMC 223 REM Not sure what im doing wrong.

Is it more of a lip on the very bottom of the primer pocket? Or is the bottom of the primer just shearing loose, leaving the outside of the primer left in the pocket?

If it's a lip, then you have crimped primer pockets. That lip has to be removed before you can re-prime. Two ways to do it. Either cut it away with one of several cutters, or swage it with either a RCBS primer pocket swager, C&H makes one and the Dillon super swager.

http://www.midwayusa.com/viewProduct/?productNumber=253550

 

[rcmodel]

450 degrees F is not even approximately hot enough to anneal cartridge brass.

Oven thermostats are notoriously inaccurate with wide temperature swings between on and off, and where exactly in the oven the temp is measured, or the brass is laying.

At about 495 degrees (F) some changes in grain structure begins to occur in cartridge brass.

The point I was trying to make is, don't risk it.

rc

 

[Mags]

Wow, is RC the only guy in this thread aware of a "crimped primer" ? Very bad advice is being given in this thread. Pop the primers out and swage or ream the primer pockets. It is not that hard and is very common in military calibers, so get used to it.

 

[husker]

I chit canned the 50 i put in the oven. it didnt work anyway. the primer will pop out on some but their is still a ring inside the pocket. it looks like bronze & a few 1000 of an inch. & yes it looks like it needs reamed. Not sure what swag is. Unless your talking about POT & i dont think any one is. Looks like i need one more tool. Ya Rc knows his stuff. Have leaned on him a few times in the past. Thanks guys

 

[Winston_Smith]

Wow, is RC the only guy in this thread aware of a "crimped primer" ?

See Post 4

I know I am a newbie but I have learned some things at THR