Two comments:
1) My Sporting Clays Classic is marker 2-3/4 and measures 2-3/4
2) The Steel Shot Specials were also bored at .740 which I believe is a shade larger than standard. I remeber reading somewhere they were 12% heavier... I'll try and find that. Here's an original ad for one from a Dunn's catalog. Little hard to read - sorry.
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