Well, I must say that I'm pleased with the number of responses to my question. They tell me that (1) I am not alone in my search for a light 2 1/2" load and (2) there really isn't one that I should have discovered in my search. Do I understand correctly that Ballistic Products has promised a new brochure on loading for old doubles? I hope so. The one they sent me has
2 1/2" loads but all too strong for an ancient gun. Rocketman, I have been bemoaning that fact that we don't have a Birmingham-like proof house where we can send home loads for pressure test. Is there such a place here? Cobbhead, I also wondered if I couldn't just use a recipe for a light 2 3/4" load in a 2 1/2" case on the assumption that pressure would be the same. I would certainly like to know the answer to that question.
I thank everyone for their response. Where would I turn if I didn't have this forum? In an email discussion of this subject with Tobay Barclay (from whom I just purchased the sidelever Army & Navy his is now showing) he suggested I pose my question on this forum. It was clearly good advice. Thanks Toby.