I am looking for a .22 airgun specifically for squirrels. I am new to air rifles, have been doing a little research, but would appreciate some recommendations. I am leaning toward a gas piston airgun, but would consider a co2 air rifle, but don't know if they would be powerful enough to reach out to 40 yards. My price range would be in the 250 dollars or less range. Just looking for a solid rifle that will last.