Clarity of Microstamped Identifiers as a Function of Primer Hardness and Type of Firearm Action

Date
2012-04-01
Authors
Chumbley, L. Scott
Chumbley, L. Scott
Kreiser, J.
Lizotte, T.
Ohar, O.
Grieve, T.
Eisenmann, David
King, B.
Eisenmann, David
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Altmetrics
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Ames Laboratory
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Ames LaboratoryMaterials Science and EngineeringCenter for Nondestructive Evaluation
Abstract

The transfer of microstamped identifiers to the primers of fired cartridges was examined using a stereomicroscope and scanning electron microscope (SEM). The identifiers were placed on the firing pins of three different 9mm handguns, namely, a Sig Sauer, a Taurus, and a Hi-Point. Ten different brands of ammunition were fired from each handgun, 100 rounds being fired using each brand for a total of 1000 rounds fired per handgun. The quality of the markings was evaluated using a simple observation rubric. These results were compared to Vickers hardness values obtained from the ammunition primers and are discussed in light of the types of actions of firearms used.

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This article is published as Chumbley, L. Scott, J. Kreiser, T. Lizotte, O. Ohar, T. Grieve, B. King, and David J. Eisenmann. "Clarity of Microstamped Identifiers as a Function of Primer Hardness and Type of Firearm Action." AFTE Journal 44, no. 2 (2012): 145. Posted with permission.

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