I found it!

It wasn't in his comment links, just a link farther down the page.

I won't bore all you non-gungeeks out there with the entire used revolver checklist, I'll just paste his closing remarks here.

In perspective:

Timing (test #5) is very critical...if that's off, the gun may not even be safe to test-fire. And naturally, a crappy barrel means a relatively pricey fix.

Cylinder gap is particularly critical on short-barreled and/or marginal caliber guns. If you need every possible ounce of energy, a tight gap helps. Some factory gaps will run as high as .006"; Taurus considers .007" "still in spec" (sigh). You'll be hard-pressed to find any new pieces under .004" - probably because the makers realize some people don't clean 'em often (or very well) and might complain about the cylinder binding up if they sell 'em at .002".

The guns in a dealer's "used pile" are often of unknown origin, from estate sales or whatever. Dealers don't have time to check every piece, and often don't know their history. These tests, especially cyliner gap and play, can spot a gun that's been sent off for professional tuning...like my snubbie, the best $180 I ever spent .

As long as the gun is otherwise sound (no cracks, etc) a gunsmith can fix any of this. So these tests can help you pick a particularly good new specimen, or find a good used gun, or help haggle the price down on something that'll need a bit of work.

I did some post bying tests on Karens Taurus, and it looks like we have a pretty good little ladies gun.