I use 300C's, much better than R22 ( oh God are we going to open up the R22 debate again).Advantages of the 300; it is more stable, more power, more forgiving and just better, I reckon on 400 /500 hours a year it is cheaper to run although it uses 11 gal fuel an hour;3 more than an R22. As for speed , mine criuse at 80 / 85 kt pulling 23 inches. I hear the CB has less guts but most of the above applies although everyone who has one reckon the C is better but CB streets ahead of R22.
The H300 was designed as a training helicopter
What was the R22 designed to do ??