The gelatin is 100% pure from
Kind & Knox. It is mixed to 10% and calibrated using a .177 BB at 590
fps to a penetration range of 7.5 - 9.5 cm. A minimum of 3 rounds
(unless otherwise noted) are
fired into the gel from a distance of 3 feet through two layers of loosely
Definition of Terms
Readings are a running average of all shots I have
chronographed of the particular brand of ammunition. A running average
provides the greatest possible number of readings and averages out the
effects of environmental conditions.
FPE - The foot pounds of energy calculated using the
advertised weight. (M x V x V / 450240)
- Depth in inches, is measured in a
straight line from point of entry to point of deepest penetration.
Recovered rounds were measured at multiple points
and then averaged to account for uneven expansion. Area of Dispersion is
used for fragmenting rounds.
- Standard Deviation, simply put measures the
variability of data (less is better)
Weight - (.32acp only) Recovered rounds were rinsed, all
denim removed, then allowed to dry before weighing.
OAL - (.32acp only) Over all length is listed because
some shorter rounds can shift inside the magazine and become "rim locked".