The exact spread of the shot is determined by a constriction or narrowing
at the muzzle called "a choke."
Full choke produces
a tight pattern. suitable for longer ranges. Pattern is too dense
and small for hunting at close range.
choke produces a more open pattern, suitable for medium ranges. Recommended
for upland hunting.
cylinder produces an even more open pattern, suitable for short
ranges. At longer ranges, the shot pattern is too thin to ensure
bore produces the most open pattern, suitable for shortest ranges.
At longer range, pattern is too thin to ensure hits.