Nope.
But if you discover a cure for cancer and it costs you $1 a dose and the single dose does the trick, yet you sell it for $20,000 a dose, yah, that's gouging.
I'm a pawnbroker and I can tell you this, no one really needs gold. it's pretty useless but for a few purposes other than jewelry and fancying up the look of something.
My simple definition of gouging is if Joe is selling a commodity that is needed for life or health and for temporary reasons (hurricane, tornado, tsunami, whatever) the availability of said commodity is nil, and Joe is selling it for way more than the going rate when times are normal, that's gouging. Now, if it's legal where Joe is doing so, I think the people in that area are going to remember Joe's taking advantage.
Raising prices on roses just before Valentine's Day isn't gouging, no one needs roses to survive.
Now bullets aren't much of a different story. I don't think anyone truly needs bullets in the quantities being purchased. Sure, buy a gun and a box of bullets or two. I don't think that we're likely to experience the level of civil unrest some are anticipating, but I do think it's a good idea for everyone to be prepared for bad guy encounters. And that includes spending some of those bullets at a range to get competent with the firearm.
Does the person need that box of ammo to live? Not if he's lucky enough to not become a statistic, and there's really only so much someone can gouge on a single box of ammo.