The FAI website is your source here, MADY. Start at their
Rotorcraft page, select subclass E-1b (max weight 500-1000kg) and click [search] button.
then you can ignore the "turbine" records - generally further down the list - and to my mind most of the "speed over recognised course" are just trumped up locations to suit the pilot (so I'm none too bothered by
file number 15110 where a Russian guy flies an R22 averaging 34.6kmh between Moscow and Yakutsk).
Lots of them are held by R44s in this category, but these two file numbers look likely to become records for R22s
16767 - Altitude with 100 kg payload - 4029m - (claim received. not yet ratified)
16744 - distance without landing - 1232km - (file under review)