It should make no difference at all .Shotgun barrels are not "regulated " as would be a double rifle . They are put together and they shoot where they shoot . In shotguns regulation is the boring of chokes to give a set pattern with a set cartridge at a set distance . Thats all .
I disagree. That may be your opinion of regulation, but not most of the gun trade's. Regulation, as regarding a doublegun means that both barrels print their respective patterns dead atop each other at usable range. That is NOT accomplished by how the chokes are bored (though sometimes correction can be made by altering the choke bore on a non-regulated gun) but rather by how the barrels are joined with convergence. This is done to compensate for the lateral recoiling of the left and right barrels on a S x S. Sure, they aren't regulated in the same way that a double rifle is, by bench rest shooting and adjusting the relationship of the barrels by changing the amount of convergence, until perfect ............ then soldering them up. Shotguns are regulated by building the barrel sets to a certain spec. If done exactly right they will be regulated with a reasonable load. The word regulation, again, regarding shotguns, does not mean they're shot, adjusted, shot some more, adjusted, ad nauseam, until finally right, then permanently joined. "Regulation" re: shotguns simply means that the barrels have been built in such a way that the centers of the patterns print to the same place.
I have seen Miller post on here the exact angle of convergence that Hunter Arms used when building their doubles. Their guns are "notorious" for being very well regulated. Given how badly many over the counter doubles are out of regulation, some manufacturers should pay more attention to it. Beretta refuses to acknowledge a problem unless the two barrel's patterns are over 8" off, from each other, at 25 yards.
SRH
