Parker Bros. did pattern tests on their guns
and usually recorded the results in the Parker Stock book.
The recorded results are given as pellet counts for each barrel.
earliest patterning was done at 45yards in a 18 x 24. It is
not known if that was a rectangle or oval. Next, they
changed to 45 yards in a 24" circle. Lastly, they used
the standard 40 yards in a 30" circle. It is believed
they used these for 8,10,16, and 20 gauge guns. It is
possible the 28 and .410 gauges may have used different
Parker Story states that
manufacturers had different pellet counts for a specific size and
weight shell. It is believed that Parker mostly used Tatum shot
but that is speculation. Having the original stock books may
answer the mystery. When the copies the stock books were
made, some of the page was missed; the patterning info (most of
the time). The last column in the stock book listed what
type of shell (powder, drams, and possibly the type of shot) was
The guns hanging tag,
if it exists, usually records the size and
amount of shot used in the test.