"If something developed a hundred years ago was as good as it could get, you'd be riding in a Wright Flyer when you bought an airline ticket and we'd still be pouring gravel in a large bore and lighting the saltpeter with a torch.
Thankfully, there's something new under the sun everyday."
Totally false analogy. The simple fact is that the original rapid development of the shotgun pretty much maxed the concept and the following 100yrs merely did some minor tweeks.
In specific I would agree that the .410 has some great room for seeing improvement but who GAF? - I mean, a .410? That's like wanting my smoothbore .22 rimfire to make better patterns.
And nobody has taken a look at how much difference there is between a carefully cut and polished cone job and a stock 649th gun on this reamer production bbl. Which all comes down to me thinking that the general concept may be fine but the individual gun may simply not need its' cone cut. In considering all the results of the mutherfications that I have perpetrated or had perpetrated on gun barrels, there is nothing that would tempt me to "improve" any of the Perazzis that I currently care for. Goes for the M12's too for that matter.
And I still have that 12ga reamer in the toolbox.
And at $50 a whack for a 5min job I'd do'em every chance I got too.
And the more applicable comment about "new" is the one that Will Rogers made - "The only thing new is the history you don't know". Which seems to have bee written for shotgunners.
have a day
Dr.WtS