I visit the High Road Forum where many members pick up range brass with mixed head stamps also buy the once fired brass then complain of accuracy and resizing inconsistencies.
Save $$ By Using Lake City 5.56x45mm Once-Fired GI Brass
https://bulletin.accurateshooter.com/2019/10/save-by-using-lake-city-5-56x45mm-once-fired-gi-brass/
Accuracy Potential of Mil-Surp 5.56×45 Brass
"So, how accurate can previously-fired GI surplus brass be in a good National Match AR-15? Well, here’s a data point from many years ago that might be of interest. A High Power shooter who wrote for the late Precision Shooting magazine took a Bill Wylde-built AR match rifle to a registered Benchrest match. His first 5-round group ever fired in a BR match was officially measured at 0.231″ at 200 hundred yards. This was fired in front of witnesses, while using a moving target backer that confirmed all five rounds were fired.
He recounted that his ammo was loaded progressively with factory 52gr match bullets and a spherical powder using mixed years of LC brass with no special preparation whatsoever. Obviously, this was “exceptional”. However, he had no difficulty obtaining consistent 0.5-0.6 MOA accuracy at 200 yards using LC brass and a generic “practice” load that was not tuned to his rifle."
SPJ
Just remember cheap bastards have more fun, and I don't cry if I lose a Lake City case.
P.S. If these people at The High Road would listen to F. Guffey and had magic feeler gauges they wouldn't have any problems.

(this is warped, sick old GI humor)
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