Originally Posted by Virginian
I have to take exception. An acquaintance bought a nice Spanish SxS and was all pissed off because a laser showed the barrels to be way out. When we shot it, she was just fine. Out of curiosity, tried it in my Browning BSS 20 Sporter, and it indicated a bad barrel regulation problem, but I know this gun shoots almost 100% on at 40 yards thru both barrels with multiple loads. So, I think the proof is in the patterning. I would definitely not rely totally on a laser where a two barrel shotgun is concerned.
Below is my friends response to a similar question.
It is my understanding that it is, or used to be, generally accepted that the industry standard for shotgun manufactures is to have the shot-patterns from both barrels centring at 35 yards. Any double-barrelled shotgun that patterns differently and does not achieve this goal fails this standard! And personally I would not purchase such a gun because in my view it is defective.
Surely all of us that shoot at a target expect the gun to place the shot-pattern from both barrels where we expect it to be and not 18 inches left or right, above or below?
Previously to this recent experience Id always assumed that any reputable doubled barrelled shotgun would place the shot pattern of both barrels in exactly the same place at 35 yards, sadly from my experience it appears this is not born out in practice and the purchaser has to check for this out of alignment. I have now had time to check all the other 7 shotguns at our small shoot and just two of these have both barrels that are aligned and correct. One English made 16-bore S/S had one barrel firing 26 inches higher and 14 to the left at 35 yards. The owner commented that a left and right rarely happened.
Just to play devils advocate with a notional, fictitious advertisement of two shotguns in a Dealers rack:-
Shotgun 1 - £1500
Top barrel shoots to the point of aim at 35 yards.
Bottom barrel shoots anywhere, could be 20 inches to the left or right or 20 inches high or low at 35 yards. User must compensate as necessary!
Shotgun 2 - £1500
Top barrel and Bottom barrel shoot to the point of aim at 35 yards checked and tested at factory.
Which of these would I be tempted to try?