i always shoot them in the head,, its just a weak air rifle
Don't even aim it at live quarry then,
I'm guessing you are only young but surely you must realise that you can't go around injuring animals and then brag about it on an open forum, ffs
That's the last thing our sport needs.
Your Rifle killed one rabbit, so it's obviously not the power of the rifle that is the problem, what is your grouping like on targets? what distance are you shooting from?
If your not confident of being able to dispatch your quarry DON'T shoot at it.