Re: .308 military brass
If the M-60 was ever in spec, it ought to stay there, what with the constant replacement of bolts, and barrels, from fatigue to the locking shoulders, so chamber dimensions ought not to be an issue!
"Work hardened" necks can be; anneal every case, upon acqusition, and every six sizings, and split necks will be but a memory!
Think about it; you are loading ammo, for the military, and it only has to work once! Would you spend a extra nickle, per thousand rouns, to make the brass more reloadable, if that is not in the contract???
My .17 Hornet was a total loading failure, from the standpoint of brass, until I got out the gas; now 20 times thru the press is mundane, and this is military brass, as well!
Formed, after annealing, a large lot of 7mm.08 cases, from LC64 Match Brass, simply because I had it, so it was cheap; still shooting all but three cases, and they were my errors, in a progressive press.
Don't start no s**t and there won't be none, Terry