PB has its issues that makes a lot of people overlook it...
It's not the best metering powder out there, although in my experience it's better than Unique and I've been able to deal with both powders without too much trouble.
Probably the biggest hindrance is the lack of at least recent load data, as you're finding. I think a lot of this is due to the fact that that IMR/Hodgdon is sort of letting it languish(incidentally the cans I've been purchasing lately are all branded Hodgdon rather than IMR). It really has been marketed for a while as a shotgun powder, although like many shotgun powders it also works well in handgun applications.
For many purposes, it gives lower velocities than other powders at similar pressures, despite similar charge weights.
I've been buying it on sale lately(around $21-22 a can), however at normal prices it's actually a fairly expensive powder. The older rectangular IMR cans only held 8 oz, and the new Hodgdon-style "1 lb" cans hold 14 oz. At the regular price of $27 or $28, it works out to being a lot more expensive than other powders in the same general burn rate range. Compare it to something like CFE Pistol, which I've bought for $19.99/lb in the past month, and PB starts to look really expensive.
At the end of the day, though, I like the stuff. Since it's a single base powder, it burns a bit cooler than most other popular powders in its burn rate range. This translates to-in my experience-a bit less bullet lube smoke. It also means a cooler gun. In a single action revolver-where you are handling and manipulating the gun a lot more than in a double action revolver or semi-auto-this is a significant consideration.
It smells good, too
For me, it's not the end all and be all of powders, and truth be told I don't even use it all that often. My main use is in lower powered 45 Colt loads. I like it enough, though, that I've been buying like crazy because "once it's gone, it's gone."
