I have used this one. It is in Imperial though. Easy enough to convert to Joules.
1 ft-lbf is equal to 1.356 joule.
ShootersCalculator.com | Recoil Calculator
There is also Chuck Hawks table (does he really exist?)
http://www.chuckhawks.com/recoil_table.htm
PS: The 2 don't quite line up but the whole thing is subjective at any rate.
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