De-Priming LC .308 Brass Problem & Question

[bigbossman]

Show us a picture of one. LC brass has a crimp ring around the primer hole, and I'll bet that's what you're seeing.

[ptmn]

Not sure if it works or not, but I have an excerpt from a poster on Castboolits that posted how to deal with corroded old lake city brass:


Oldfeller

11-21-2005, 12:10 PM

Cheapskates used to buy old Lake City brass because it was cheap. Now-a-days, it ain't so cheap anymore and but the knowlegeable buy it because it is THICKER than commercial brass, both in the walls, at the web and more importantly at the neck (which makes for better bullet alignments in standard commercial chamber necks).

I bought another 1,000 7.65 Nato once fired brass a few months ago. It was struck at Lake City arsenal a long durn time ago, 1979 and 1986 predominately, and apparently it was fired a long time ago too. 1 in 25 primers will NOT come out, but prefer to break the head off the primer leaving an unremoveable wall ring in the primer pocket, which makes for a scrapped case. This is not good, and the phenomina will only get worse as the years roll on and the amount of corrosion increases.

So, here is how to deal with stuck primer pocket old miltary brass. Put a trash can liner in a small trash can, pour in the "as shipped" cleaned brass. Take a bottle of cooking oil and pour in a quarter cup, drizzling it in as you stir the brass around. Leave it sit for at least a week, pulling the bag up periodically and manipulating the mass of brass to move the oil around really good.

Goal is to get the oil down inside the case and all around and in the primer pockets. Cooking oil is a polar solvent, it will remove old bumper stickers from car bumpers and it will unstick corroded crimped in primers right through the corrosion -- if given enough time to work through the corrosion. Think of it as slow acting Kroil and you won't be too far off the mark.

When you go to size/deprime the brass, it is lubed already and the neck has lube inside it already too. The primers pop out fairly easily and your dies don't get all scratched up either (works better than most commerical spray on lubes anyway). I use a long handled cast iron LEE press to crunch my military brass -- the long handle makes it a breeze to process and the solid cast iron construction isn't even stressed by crunching through the oversized machine gun case wall expansion and the crimped in primer removal.

So now you got deprimed brass with the machine gun expansion taken out of them -- except for the crimped primer pockets -- nasty old primer pockets.


I don't know if this guys method works or not, since I haven't had to deal with "ringers" which is the term for a torn out primer. I would imaging that if you use this guy's technique, you might have to go to the hardware store and pick up a little bit of powdered TSP. Mix some TSP with dishwashing detergent in a 5 gallon bucket and rinse your cases to get the oil out. I wouldn't want any residual oil to mess with primers or powder.

[Hunter57dor]

currently going through issues like this with my new shipment of Lake city brass....

i had 1000 of them, i broke two decapping pins getting all the primers out, and still have 250 to decap *cries*

I have been using an RCBS primer pocket swager with mixed results. some of them work just as well as commercial factory brass, some of them still won't accept a primer without an amount of force that makes me ehh.... uneasy. lets just say the eye protection is never far away while doing that.

its all pretty good brass though, except for a few damaged case mouths that i blame on the US postal service's poor handling of the box *raises fist* never shipping through them again!

[popeye4]

I purchased all the brass off gun broker once fired. On some of the cases after depriming them leave the sides of the primer stuck inside the primer pocket. Is the case useless at this point. The die didn't remove all of the primer. I just thought it was weird. I just tossed those cases to the side.

Get one of these: https://www.grafs.com/retail/catalog...roductId/10573

I bet that will solve your problem.

[micro911]

I use a Foster Co-Ax single stage press and have never had a problem decapping/resizing the LC or military brass. And, I use Dillon primer pocket swager. It works well without a problem.