Do you have a methodology down that allows you to run* a PGO shotgun as fast or faster than a similar gun with a stock?
*Cycling the action, transitioning to targets, and/or using the gun from improvised positions that don't involve standing up?
Of course I don't. No one does.
I take a different view of the PGO gun to the view held by some here. As noted above, it is not a promising alternative to the shotgun with a proper stock on it. It is an alternative to having no shotgun.
So no one is confused, my shotgun is currently wearing a conventional wooden buttstock and rubber pad; the pistol grip is in the parts box. Absent the need for maximum compactness, why fool with the pistol grip? I got involved with it when doing a lot of traveling in mixed modes of transportation that included passing through a pistol-hostile jurisdiction. I don't know that the PGO was the best answer, but it was the best I could think of at the time*.
If this were the gun you had, how would you best use it? How would you get the most out of it? That was my question, and not, 'how can I run this thing just as well as a whole shotgun?' For of course it isn't a whole shotgun; part of it is missing. The butt is missing from the grip area on back, making it half-butted, so to speak.
I hope everyone sees the apple and the orange.
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* Something I didn't think of at the time was the nifty Beretta Companion folding shotgun. I probably did not think of it because it was a single shot. The High Standard bullpup was discontinued and there were reported reliability issues and anyway, I couldn't find one.
Some sort of bullpup is probably the best answer here, but those I've seen so far have been heavy or bulky or generally awful in other ways. There are, though, some promised for future release. We shall see.