In the US we have multiple issues with shooting old doubles. First is semi automatics are still a tremendous part of the shotgun market so ammo makers all must load towards that pressure level which is way too high for many fine doubles. Second is what I consider a dumbed down writer group for all guns. They use blanket statements instead of thinking and explaining the points and counterpoints of shooting old guns. So they just say dont do it or have it checked out by some magic gunsmith like one look will tell all. Third we still have people who think the length of brass on a hull indicates pressure levels or safety to use. Fourth we have a maniac desire for velocity and what I call magnum anything. We now have 3 1/2 12 semi autos just because we want more, faster and heavier hunting loads.
I bet many low pressure loads never get published because powder makers know that they will not cycle most semi automatics. We could be using many combinations that we dont even consider. Instead you either reload with what powders are available or buy from a specialty loader like RST at premium prices.
