I'm not a huge fan of Taurus. I don't find them to be in the same class with Ruger or S&W. The finish is always nice, but I don't think they watch their tolerances. I had a 66 a few years ago and it was gorgeous (put S&W to shame), but when I dropped 125gr JHP bullets through the chambers, they fell through each one! It was as if someone just drilled holes without bothering to spec the throats. Two of the chambers let 158gr wadcutters fall through, which is totally inexcusable!
If you buy a Taurus, take some JHP bullets with you and drop one into each chamber, making sure not to push them through any that stick (since you don't want to resize them). If they fall right through to the counter, hand the gun back and ask for another until you find one that's sized better. Under no circumstance should a wadcutter or semi-WC fall right on through. (If two of the six JHPs fall through, that's no real reason for concern—many Rugers do that—but not all six. Some target shooters mark the chambers that are too loose, but I've never had to do that.)
Another option is to take a pair of calipers and measure the throatings.
My sister used one at a class recently and could barely hit the target at 50 feet. That's about the same experience I had with my 66.