What is the range of a .25 big bore air rifle?

Answering this question is not as simple as it sounds. I suggest you read the attached link ( http://www.straightshooters.com/general-airgun-information.html) it gives some great information about effective ranges with a .25 caliber pellet. Also I applicate the statement that a .25 is big bore pellet. Unfortunately it is considered small bore. A big bore would be a .45 or 50 Caliber pellet. Also remember that the air rifle power plant has a lot to do with the range. I own a .25 cal Hatsan break barrel and a .25 Caliber Condor PCP air rifle. Obviously the Condor has a further range than the Hatsan. This is why manufactures don't publish the range of the air rifles. there are just too many factors to consider like Barrel length, Weight of the pellet and power plant of the air rifle.