I'am an exterminator and do Sparrow/Starling shoots inside buildings. Plus I get paid for it. The company guns are both .177 cal.. Doing this once or more per week, I'd rather buy my own air gun so I always have one with me that shoots consistent for me.

Does a .22 air gun shoot tighter patterns than a .177 because of its weight/momentum or the .177 for the speed.

Normally dealing with 10 to 20 yard shots. The first shot needs to count for the small/smart sparrows.

Also, do you know of a preferred brand of air gun? With sprinkler heads, lights and windows, accuracy is the main factor.