Nonlinear Material Behavior Analysis under High Compression Pressure in Dynamic Conditions

Table 4

Standard deviation and relative spread using copper crusher method at 25 mm.

Test ammo #	Mean of 10 fired rounds
	Chamber pressure [MPa]	Standard deviation [MPa]	Max value [MPa]	Min value [MPa]	Relative spread (%)
1-NATO	297.69	6.34	308.8	291.5	5.93
2-NATO	293.6	6.39	302.4	287.2	5.29
3-NATO	296.9	5.34	304.5	287.2	6.02
1-NSTD	296.24	9.80	321.2	287.2	11.83
2-NSTD	297.77	8.32	310.8	287.2	8.21
3-NSTD	300.93	11.81	321.2	287.2	11.83