Like Impotence said, your gonna have to kill most if not all the birds around your home to get rid of the pest. It takes months! Your better off spreading feed somewhere away from your home. Even that can cause trouble though because you might attract them to an area where there is no natural food so you'll have to pick a good place to bait them. Or just repeatedly smash the nests, the birds wont keep coming back to somewhere they cant breed.
We are limited to a pitiful psi in this country when it comes to air rifles, you will be lucky to hit any animal (or small target for that matter!) 150 yards away, let alone kill it!
I had a mate who used to work for pestokill and I used to go shooting pigeons in railway stations at night with him. He was allowed a slightly higher powered rifle than you can get in the shops and it was good for 40-50 metres on the pigeons. My standard rifle would barely knock them off their perch at that distance!
Id be looking at Weihrauch if I wanted to kill things.
Weihrauch-Sport
Use flathead pellets. I used to use pointed pellets but after my pestokill mate gave me flatheads ive never looked back. They do far more damage!
Either that or a 410 shotgun, but I dont know how licensing stands with them.
Donkey, how does your precharge compare to standard air guns? I have only ever had a precharge pistol (the now illegal Brocock ME .38 compact, im waiting for the next amnesty! Maybe I shouldnt say that :guns: ) and thought it was pretty crap compared to the Webley tempest.