Fx wildcat mk3 and JSB hades .25

I have seen others with great results but that has not been my experience up to this point with my Compact WC MKIII. I have not put in any real effort to see if it is a speed issue and ran out of time in the fall to see if their was a fix for getting them as consistent as the JSB Exact 25 grn pellets which stack in one hole at 50yds. I have heard others say they lose consistency the further away from 50yds you get but wanted to play around with some so bought a tin to try. Plan to look at it in the Spring when warm weather returns.