Lake City Match Brass

[oneshot onekill]

I have some brass with the headstamp: LC MATCH 70. I assume it's Lake City Match brass made in 1970. I'm having a slight issue with this brass. After I resized it, trimmed it, and de-burred it I dropped one or two into the chamber on my 40X just to check the fit. When I close the bolt my extractor doesn't grab the rim of the brass unless I pull the trigger. Apparently that causes enough vibration for it to grab? Is this a common issue? Should I worry about it?

I noticed when working on the brass that it's much heavier than my commercial brass. The walls are thicker. Everything seems beefier on this brass.

I trimmed the cases down from 2.019" to 2.010". Could I have pushed the shoulders back when resizing? It doesn't look it.

 

[jpretle]

Re: Lake City Match Brass

You might check the extractor. It may be broken. Also, is it possible you may have oversized the brass, allowing to too far forward into the chamber????

Most military brass is heavier/thicker than most commercial brass. This affects internal case capacity.

 

[steve123]

Re: Lake City Match Brass

Maybe the shoulder has been bumped too far??? and the case is going forward when struck by the firing pin then bouncing back under the extractor.

 

[oneshot onekill]

Re: Lake City Match Brass

The extractor is fine. That was the first thing I checked. It grabs commercial brass I sized the same way just fine.

I don't recall this brass being any harder to size.

What is strange to me is that when I pull the trigger it grabs it and pulls it out just fine. (There's no primer in the brass at this point)

 

[jwoolf]

Re: Lake City Match Brass

Make sure you don't load your Lake city brass with the same loads you worked up on commercial brass. You'll find your pressures MUCH higher. As said above, it affects case capacity. Start at least 1gr lower in powder charge.