What’s the best slingshot ammo for squirrels and pigeons?

Do you shoot lead or steel? 11mm or one of the smaller diameters? We get techie and bring out the ballistic gel, so Wayne Martin can solve the problem of the best ammo for birds and animals.

For Wayne’s catapults, go to CattyShack.co.uk
Click here for Phill Price’s airgun pellet test on this ballistic gel