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If the case in questions had a military crimp in it it needs to be removed. Other than that military surplus stuff in 5.56 has thicker walls therefore less case capacity so what might be a safe load in Winchester brass may not be safe in Lake City brass, but this is true in any case that is significantly heavier in any caliber.
For what it's worth the loads I use in my .223 bolt and AR 15 are loaded the same regardless of brass and I have not had any problems whatsoever, but mine isn't a borderline hot load either.
All my good loads for my bolt action rifle are under max and have used Winchester, LC, GFL, and PMC cases with no difference.
The new brass has allot of PMC brass with crimped primers. Took me about 6 hours to do 400 cases sized, trimmed, chamfered, and then reaming the pockets. I'm looking at varmint AR uppers and everyone chambers for something different.
Stag 6h = 5.56
RRA Varmint = .223 Wylde
DPMS = .223 Remington
Some of the brass was within spec < 1.76 but instead of wasting time measuring it all I just trimmed everything. Figure the fewer the variables the better. All brass I've ever bought whether it's new or used gets the same treatment. Do others do this as well or do you guys just shoot if it's within spec?
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