On a Airgun Forum I used to post at but since forgotten it's name... I had started a Rat Hunting beginners(Me of course) thread but however I didn't end up doing that as I live in a small city and have yet even seen a single where live...
Now if memory serves, I was told that a .177 pellet going at ~350 fps will kill rats cleanly as long as the shooter does his or her part. However a heavier .22 pellet at ~40 0 to ~450 fps will be more reliable.
The only thing I ever shot at with BBs are soda cans and 2L bottles. I never even used pellets for some reason...
Now if memory serves, I was told that a .177 pellet going at ~350 fps will kill rats cleanly as long as the shooter does his or her part. However a heavier .22 pellet at ~40 0 to ~450 fps will be more reliable.
The only thing I ever shot at with BBs are soda cans and 2L bottles. I never even used pellets for some reason...