hello mate
im a new and keen hunter myself
i bought a gamo shadow matic - £160
and a nice little 4X28 SMK scope off ebay - £19 inc p&p
with my 4X28 scope i can easily kill a pigeon at 70 - with clean headshot.
check it out, might just be perfect for you.
ebay is a very good place for scopes and air rifle accessories
cheap, good quality and effeciant
cheers buddy
laters