Shotgun Pattern
Density Calculator

This calculator estimates how many pellets will be in a 30" circle at various ranges depending on the size of the shot, the size of the load, and the constriction of the choke. This is valuable to understand the effects of shotgun patterning with various choke constrictions and the density of shot patterns for various loads.

To calculate the approximate number of pellets in a 30" circle at various ranges select the appropriate shot size, load size, and choke constriction from the drop down lists, then press the Calculate Pattern Density button. 

SHOT SIZE LOAD SIZE CHOKE

Pattern Density
(Approximate number of pellets in a 30" pattern)
20 yards 25 yards 30 yards 35 yards 40 yards 45 yards 50 yards 55 yards 60 yards

Copyright 2002 © Bj Rollison