RE: A different approach
Congrats on the first flights. My guess is the 22x12 will be a pretty big load on the motor/esc combo. It was the prop of choice several years ago when the lure of electric was the very slow flight with great braking on the downlines. However, for the outrunners in the 225+ kV range it is a lot of amps. You might consider the 20x13 or 21x12 props. More load than your 19x12 but shouldn't be too much for your motor.
Good luck, hope to see you at BARCS.
Woodie
Team Acme LG
Team Blenderm