I have a FX Crown .25 but was concerned about the Smooth Twist barrel X and regular favoring mostly JSB pellets, My Brocock Sniper .22 has a LW barrel and it is able to shoot a wide variety of pellets accurately, my Crown only shoots JSB pellets accurately. My Sniper likes Cheap Crosman Premier 14.3 gr pellets, Some JSB Exacts, H&N Barracuda, H&N FTT. and Right now I am shooting the 14.3 gr Premiers at 955 fps and am getting 90 shots from a 240 bar fill. Without touching anything on the gun if I switch to the 21.1 gr Barracuda's the Sniper shoots them at 845 fps, that is over 33 foot pounds ! I do not have this kind of flexibility with my Crown, its JSB's or nothing unless I try different X barrel liner. Not trying to start an argument, just want to know your own personal experience and thoughts.