Dave M, The data I have is for 2 3/4. I see data for 2 1/2 in. hulls using 3/4oz shot.
The DR is a tall wad. Depending on the bulkiness of the powder, 2 1/2 in. might work with a roll crimp?
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 "Double guns are a sport and a pastime built into a beautiful package to which I attach myself when entering the great theater of autumn, those days now grow more precious because we are given so few".. Robin Lacy
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