This might help. Gives the maximum for normal and long cage.
http://www.retrobike.co.uk/gallery2/d/118850-2/2000+Campagnolo+10+Speed+Catalog.pdf
Thanks for digging this out, but im sure mine is a medium cage rather than short or long.
@Poetic started
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This might help. Gives the maximum for normal and long cage.
http://www.retrobike.co.uk/gallery2/d/118850-2/2000+Campagnolo+10+Speed+Catalog.pdf