For all practical purposes, there ain't no difference. Many reloaders use small-base full-length resizing dies, but that's to ensure reliable extraction in semi-autos or in MGs. When using new, "store bought" ammo, don't worry.
No mil-spec load is hotter; there ain't no magic in military steel. The hotter the load, remember, the less reliable the extraction in SAs and MGs. The idea of "hot loads" for military cartridges is due to the 9mm Para, where the full-auto guns are indeed stronger than handguns. Even there, the pressures are much, much lower than for rifle cartridges...
FWIW, Art
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