Would my 1/2 horse 1/2 pony be good for barrel racing?

I've heard some people say half pony half horse is a very good combination for barrel racing and pole bending. My horse is about 15 hh. maybe a little smaller. I've seen him go pretty fast and he can take some fast turns! I dont think he has ever barrel raced before though. Does anyone know if he'd "maybe" be good??