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Old March 13, 2012, 05:07 PM   #4
Twycross
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Join Date: January 26, 2005
Location: Montana
Posts: 1,187
Quote:
Were the reloads you were using the once fired Winchester Nickle brass?
Yes, that is the brass I was using. But it seems to be sized correctly, and I haven't had this issue when using the same once-fired type in other batches.

Quote:
When was the last time you calibrated your scale? What scale are you using and did you spot check every 5th round? Also when was the last time you gave your chamber a good cleaning? Type of dies and cases might also help.
I use RCBS dies, and I check every round (I load in small quantity). The chamber is clean, but even if not, it shouldn't matter. I can chamber a round from the batch in question, and then a factory round or a round I just loaded, and feel the difference.

As to the signs of overpressure, two primers were completely ejected from the primer pocket.
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