For your .20 calibre hunting pellet try the H&N Crow Magnum.
The H&N Crow Magnum pellets in .20 calibre looks like being discontinued by H&N. Stocks of these pellets are limited and will be phased out as supply diminishes. The H&N Crow Magnum pellet requires a minimum of 12Fpe of muzzle energy, has a weight of 12.81gr and an effective range of 50 metres.
These .20 pellets are hunting pellets through and through, with anticipated vermin control up to rabbit and pigeon sizes. You guys who own a .20 calibre air rifle, be it a springer or a PCP, if you are into vermin control of hunting, you can?t go past the H&N Crow Magnum pellets.
Price $15.84 per tin of 250.