I would email the manufacturer to get it straight from the horse's mouth.

Guessing the 25 caliber similar output as the 22 at max power IE Daystate Redwolf HP in both calibers so 25 may be too slow if heavier. If not then go 44gr in 30 caliber instead makes more sense probably larger diameter can make use of the push of air. 

The 

33.95s were probably born due to the Huben K1 gen 1 IMHO because nothing else would shoot with decent enough accuracy.