Late season birds are known to be more difficult to kill due to thicker feathers and heavier layers of blubber, plus they have a greater escape distance.
Hunting during the cold season
What changes with the transition from summer to autumn are the average daily temperatures.
The atmosphere also becomes denser, and the denser the atmosphere, the more resistance faced by projectiles. Furthermore, as the temperature drops, almost all powders slow down their combustion rate to a greater or lesser extent, developing lower pressures with the consequent slowing down of the speed of the projectile. In cold and humid climates, it is therefore advantageous to use cartridges which, under the same conditions, develop higher pressures such as, for example, the range of HP cartridges by Fiocchi.
What’s the best cold weather cue?
Many waterfowl and pheasant hunters switch to larger shot pellets as they move into the winter season.
To give a quick example: as a general rule, a lead shot no. 4 at -6° behaves like a lead n. 5 at about 15°.
Therefore, it is a very good move during the late fall and winter months to increase pellet size to compensate for the eroding effects of shotgun energy in a denser atmosphere and longer average shooting distances.
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