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Posted: 7/29/2011 5:06:28 PM EDT
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I'm trimming 5.56 brass on a lee zip trimmer and noticing that a good portion of the brass is not true, that is, there is a definate wobble as the brass is rotated on it's axis for trimming. Some cases are pretty bad while others are fairly straight and true. Anyone have a good cure or fix to true up the brass?
I'm pretty careful to lube well when resizing / depriming, so I don't know that the resizing process is necessarily the cause. Anyone have any insight? ETA: I'm using once-fired LC brass. All brass was fired in AR-15s, no mg brass... |
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I think part of this is the nature of the beast, aka the zip trim. It seems to "grab" the cases slightly differently each time you seat them. I've had some that wobble, and you take them out and put them back in and then they are smooth and straight. So I wouldn't immediately assume your brass is off axis bent or distorted.
It is also possible that the base is slightly off center from where the extractor grabbed it and yanked the brass out, probably more likely with hotter loads such as lake city might come from - 193 or 855. I do not think a normal resizing die would fix that to perfection. And the main thing, and only thing really, that matters is, do they feed and eject smoothly from your rifle? When I'm resizing a batch of brass, I'll periodically drop a few cases in the chambers of my ars and yank the charging handle to make sure they pull free easily and eject smoothly. If they do, then what's the problem? |
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