Hirschfelder headed the E-8 Interior Ballistics Group.
2.
Generally, bullet shapes are a compromise between aerodynamics, interior ballistic necessities, and terminal ballistics requirements.
3.
Joseph Hirschfelder was brought in as an expert on internal ballistics, and headed the Interior Ballistics Group.
4.
Gain twist has a slow initial twist in the barrel progressively getting faster until the final twist rate is attained near the muzzle, resulting in less torque being imparted to the bullet during the highest stress phase of the interior ballistic cycle, and thus less barrel wear in the throat of the barrel.
5.
From Engineering software such as : Solid Edge and AutoCAD for design; FEMAP for finite element analysis; PRODAS and IBHVG2 for interior ballistic analysis; MATLAB for engineering and data analyses; ProAnalyst for HSV viewing and analysis; MS Project for most scheduling and budgeting activities along with in-house developed spreadsheets.
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