Its hard to say what caliber is better long range because of the projectile possibility's. As far as economy the .22 is hard to beat, lots of ammo choices lower air consumption, more pellets per tin. I currently own a M3 .22 and it suits my purposes. The .25 is a perfect in between caliber and shoots the 33.95 pellets at distance extremely well. My first Impact was a .25 and I could hit shotgun shells out to 135 yards with the JSB 33.95s.