I shoot mostly squirrels. I have a .22 marauder and it kills them with no problem. I doubt I'll ever need to shoot over 50 yards. I haven't experienced a .25. I know the pellets are more expensive and it takes more air per shot, but is the energy produced worth it or is it overkill (haha). I understand the advantage of cross wind resistance and downrange energy, but the .22 pellets I use are already passing completely through squirrels and traveling on. The larger diameter will definitely cause more damage, but when is enough, enough. Why are so many of you seemingly going to a .25. As a comparison, I do all my deer hunting with a .243 federal premium nosler partition, I've never lost one and I have shot some big deer out to 250 yards. You don't need a 300 win. mag. Sell me on your choice. Thanks