The application would be a dedicated short (21" or so) barrel, so the PC would not adversely affect handling or aesthetics. This would primarily be a Slug/00 Buck barrel and if it throws decent I/C patterns with field loads, that's icing on the cake. Field loads, and the fact that I prefer ribbed barrels, are why I'd start with a sporting barrel instead of the factory short tube.
In that light, I'd probably just have an I/C Tru-Choke installed and be done with it. The cost of having the barrel shortened, sight remounted and choke work is actually little less than factory installation of a PolyChoke.
Your point about breaching devices is well taken Jaguar. Having used them, I am perplexed at their popularity with the general public. I suppose it's just the thing for those times when you locked your keys outta the house and left your shotgun, face-shield and armor leaning against a tree in the front yard
Personally, I'd far rather have a PC on my shorty than a breaching device.
Virginian, I know you hate these things with a livid passion. Thank you for your restrained and intelligent reply.