Yep, 54.9fpe out of a break barrel hatsan 130S and 135QE .30, with hatsans new 160 BAR gas piston. Both 30's have been gone through for friction reduction, barrel lapping, Crown re-cut, pellet port modification and on the .30's the moderator internals have been modified and so has the barrel shroud, that's just with the 10.6" barrel, If the barrel was 17.7" like the 125 .25 the 45gn .30 pellets would come out at around 820fps/67fpe and the 37gn would be about 925fps/70fpe, yet, as it stands 45gn at 724fps has 30.4fpe at 100Yds., 37gn is 32fpe. -- I haven't done the pellet 'splash' test (Flowering) with the 37gn Alloy pellets because they are $35.99 for 154 of them, P.A. has them at almost double that price, here is a picture of what my .30's did to 4 pellets fired into 2" thick steel for effect, they 'splashed', came apart instead of turning into the pellets that 'flowered'.So your saying you generating 55 ft lbs with 37 grain pellets.
I’d have to see that to confirm it.