in period test the .25 48 developed less power than the .22. might have been the relation of the acceleration of the pellet and the short barrel. the patriot/kodiack has a longer barrel, allowing the pellet to reach a higher speed before air prssure dissipation at the end of the barrel. that is the reason the .25 48 was not as efficient. the new crop of .25 available are long barrel guns. the b28, the marauder, the patriot, the rx2, etc... no carbines. the only carbine available in .25 now is the BSA lighting and that shoots in the high 500s, very low 600s depending on the weight of the pellet. Forget long distance shooting with a .25. Even a rx2 i have been testing lately will shoot a under 20 gr .25 at only 720 fps. at that muzzle velocity your effective range is going to be about 40 yards. remember that the trajectory will have an extreme curvature, and unless hold over was your major in college, it is extremely difficult to master and to make it a consistent way to aim, making shooting pass 50 yards a crapshoot more than a skill. But for short range shooting... nothing hits like a 1/4 incher...lol