Re: more free brass questions.. 308/762x51nato
The only major thing I've noticed different about reloading some 7.62x51 NATO-stamped brass is that they might have reduced case volume compared to commercial .308 brass.
If you're running a near 100% load density powder or higher (IE a compressed load), be sure to back off a bit and work your load back up for the reduced case volume.
I've seen the same thing between 5.56 and commercial .223 brass as well.
For this reason, I still prefer to segregate military and commercial brass.