My longest one was at 60 yards, but it was accidental so I wasn't that impressed.
Some of the ones I have been impressed with though were I once robin hooded two 1714 Eclipses cut to 21 inches and shooting with a 4 inch overdraw while goofing around practicing for 3 spots at 20 yards. 1714's are SKINNY by the way!
Another one was when I robin hooded two 2213's, one a bare shaft at 20 yards. At that point I decided my bow was tuned close enough

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Another one was when I robin hooded two 1816's with glue on nocks (hard to robin hood those because the back of the shaft tapers to a point). I did it during a vegas three spot shoot. Too bad I shot the wrong target that already had an arrow in it and it didn't count[:@]. That one I actually kept and still have in my bedroom, I need to hang it on the wall at some point.
I have robin hooded enough arrows that I get sort of upset when I do it. I don't get two excited anymore though unless I am actually trying to do it. Most robin hoods are accidental in my opinion.
Paul