The two pellets I use are the ones that group the tightest out of gun up to 50mtrs. I have a dozen or so tins that didn't shoot as well especially the 18 gr and above. I've had no issues with them knocking over hares, cats, rabbits, pidgin, pheasant up to 45 meters. From what I've read(don't know from experiance) a heavier pellet retains volicity more and over a longer distance will reach the target quicker.
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