Opinions, Myths, Facts, Fuddlore? Lets have it.
As said, this was purpose built for PPC. It was also mentioned but not explained in detail that PPC was originally meant for law enforcement "only."
What you would often find, at least when I was around it (late 1980's) was that most clubs would allow other enthusiasts to shoot matches with them but typically not for score or ranking with the officers. And then the regionals, sectionals, state and national matches were going to be sworn LE only.
The revolvers were most often S&W K-frames. Less often you could find S&W N-frames, some Colt revolvers and some custom Ruger revolvers built on the Security/Service Six medium frame.
The barrels were designed specifically around the 148 grain wadcutter. Some folks would use the lower cost double-ended cast lead wadcutter, but the guys who spent the dough were using the soft swaged hollow-base 148 grain wadcutter.
Most all of the S&W custom jobs were done on the Models 10 and 64, mostly because it made more sense to convert a gun that was lower in cost to start with. Occasionally you see them done on a Model 14 and sometimes on a Model 19. Ron Power did a number of them on the Model 19.
PPC was dying off by the time the L-frame was getting popular, although they shared some time in the early 1980's. I am a genuine fan of custom PPC revolvers and I have seen
MANY and the fact is that most done on the S&W were done on K-frames and precious few L-frames.
You might find... that your new old PPC revolver has occasional fails to fire. It is not broken. Because PPC shooters shot double action pretty much 100% of the time, the custom builders put a lot of effort in to making the most incredibly smooth DA trigger stroke absolutely possible.
To this end, they smoothed many parts and they used
lighter springs and lighter hammers and many or even "MOST" of these custom build guns simply hit the primer with less force. That's the cost of a ridiculously light double action trigger stroke.
To that end, competitors used exclusively the most sensitive primer on the market when they rolled their ammo. They all used the Federal 100 SP primer which is the easiest to light off.
Effectively... this often means in many cases that these old custom PPC revolvers can be difficult for owners today that do not handload their own ammo.
With the S&W design, it is possible to shim the strain screw and add energy to your hammer which can force the revolver to ignite any/all primers on the market. Understand that when you do this, you will also be adding pull weight to that sublime DA trigger stroke.
As I said, I am a big fan of these old guns. I have six of them myself and enjoy them a lot. When I first got in to them, I would shim the mainspring to make them function 100%. But it altered the amazing DA trigger stroke so much that I returned them to their custom tune and I went out and bought a lot of the Federal 100 SP primer and now I simply feed them what they like.