Badasses benjamin

I'm not a tuner.my benjamin.trail when new with 14.3 690 fps to 710 fps.then my crosman ram blew.i found a kaller r 19 100 mm stroke ram filled to 190 bar.it was close but not perfect.i used three or four steel washers as spacers to make the seat engage. 745 to 760 fps but I seen my seal was shot so I got a gamo power seal and polished chamber to mirror finish and threw in a breech seal also790 to 815 fps with 15.1 pointed rest .disassembled and reversed ram like a reaxis piston or np2 840 to 865 fps no diesel .my kaller ram was 10 bucks seal less than 20 ..do the numbers that's some umph at the muzzzle 25.5 fpe