7 1/2s will give you humane kills if your a competent shot with them ... rabbits, crows pigeons pheasant snipe woodcock squirrel and the odd duck and hare have all been shot by us with no issues
Hmmm duck, I was not aware you could buy none toxic in 7.5s, and hares well I hope they were no more than ten yards away with 7.5s otherwise you are a cruel sod who does not deserve to be shooting.
Hmmm I'm in northern Ireland different laws on the usage of lead shot ...