I would say a FAC air rifle if noise is an issue. Otherwise a small high velocity C/F aka .17 Fireball or a .204. If its pure pest reduction then body shoot them if however you will sell them head shots only. Also you will have an effective range further than you can accurately shoot. With a C/F you could put up a high seat and effectively shoot everything within 250 yds either way so could cover a lot of area. In .204 you could go down to the lightest bullet eg a Barnes Varmit grenade and these will all but vapourise, so no chance of any form of ricochet.
Alternatively go completely covert with a PCP/ thermal and N/V a Pard 008 would do very nicely.
D
Alternatively go completely covert with a PCP/ thermal and N/V a Pard 008 would do very nicely.
D