Secret Life of Brass

Описание к видео Secret Life of Brass

This video measures several aspects of brass evolution over ten firings and examines differences and similarities in Lapua .220 Russian, Norma 22PPC, Norma 6PPC, and Starline 6.5 Grendel brass chambered in the 6PPC. Comparisons are examined among the following variables after being fired ten times with a variety of mild to hot loads:
Precision
Ballistics
Overall Length
Head Space
Case Head Thickness
Neck Spring Back
Case Web Diameter (.200 Datum Line)
Primer Pocket Depth
Primer Pocket Diameter
Flash Hole Diameter

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