Rule of thumb: the further the shot, the more constriction (tighter choke) and the bigger the pellet. Up close, open the choke so the pattern has room to spread - a tight choke on a close bird is a miss or a mess.
⚠️ A starting point, not gospel. Every barrel patterns differently - the only way to know your effective range is to pattern your gun with the exact load you'll hunt, on paper, at the distances you expect. Always use non-toxic shot where the law requires it, and never exceed your gun's proof for steel or TSS.
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