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Old October 4, 2012, 12:28 PM   #6
wogpotter
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Join Date: September 27, 2004
Posts: 3,165
Let me clarify a slight misunderstanding for you as it might help.
You won't be "loading hotter" (or colder) for military Vs Commercial brass. What you'l be doing is compensating for different internal volumes to produce the same pressures & velocities with both.

The thicker brass has the same external dimensions so the thickness intrudes into the internal volume, reducing capacity or increasing pressures if loaded the same. Military cases typically need a reduction of 1~2 grains of powder to compensate.

Military cases are a little more durable in the hard extraction cycle of semi-automatic rifles & will handle the dings a hair better than thinner brass. However it comes at a price. Military primers are usually crimped in, & so harder to remove, plus you'll need some way of removing the crimp, so there is more work involved in the first cycle of case prep.
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