What is the highest ISP for a hybrid ?

Hello Group
Just curious, what is the highest ISP achieved by a hybrid, not theoretical
or in a vaccum, just real sea level results?
lets say for Nitrous oxide, Oxygen or even Exotic Oxidizer's.
With any solid fuel, even the exotic's.

Dave
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Dave Griffith
NAR 14156
The R.A.T.T.-works
Monterey Machine Products
1504-A Industrial Park Street
Covina, CA 91722 U.S.A.
http://www.rattworks.com