Piper , One day you and I will see eye to eye over something .I live In hope .
Those who have never worked in a barrel shop may not fully understand how they are made on a production basis .Look up YouTube there several good examples .
Gunmakers , Purdey , LC Smith or AyA machine a standard action body with predetermined striker centres. The barrels are made so the centres at the breech match those of the action .
Barrels are made in lengths from 25" to 30" based on these centres, they are put together so as the tubes touch at the muzzle with the tubes straight ,no bows or bends , that's it .
No one has calculated convergences if they had you would never see a side by side with tubes that touch at the muzzles .
If you compare an older Grant with wide centres to a modern gun like the AyA that has narrower centres both with 28" barrels it will be obvious that the two guns can not possibly shoot to the same place at the same distance so how can they be regulated?
Fact is had you asked me 30 years ago I would have said the a 28" SxS would have had over lapping patterns at 30 yards , 15 years ago I found I was wrong and it came as quite a surprise .
The problem that long held beliefs often compounded by well intentioned writers who have repeated these without question as they were told it as "fact" are hard to put aside, so there is no point in Me saying anything that is untrue as it is my credibility at stake .
I can not explain any clearer than I have tried to and hope that those reading gain some understanding of actual gunmaking process not "what every one knows ", dispelling a few myths along the way .
Last edited by gunman; 05/05/14 05:19 AM.
