Yeah, 27-30 fpe seems to be in the ballpark for Hatsan 125's. When I first joined I asked about a more powerful springer, ~40fpe in .22 or .25 caliber. The general response was go pcp or custom build. Lol...Dear Hatsan, please build a bigger, badder break barrel. The 125 & 135 have become normal and we request nothing less than 38 fpe in .22 or 40fpe in .25. Increase the stroke another 100mm or so, and give it a 60mm piston. Give it your beautiful walnut stock. If it weighs 20lbs unscoped it's fine. We'll blow a hole through anything out there and that's what counts. Haha, too much sugar in my coffee today...
Yeah, Brian's numbers for his 125 are really, really high.