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Primer Mfg Date Comparison Test IV: 30-06: 58.0-grains A4350,
168-grain MK, 3.25-inch OAL, Test Barrel

Primer Type	Manufacture Date	Peak Chamber Pressure (PSI)	Muzzle Velocity (fps)	Energy to Pressure Ratio (fps²/PSI)
215	1970s	61,400	2927	140
215	1995	59,400	2908	142
210	1970s	61,100	2932	141
210	1995	59,000	2901	143
9½M	1995	58,900	2896	142
9½M	1970s	58,800	2904	143
9½	1970s	58,500	2897	143
9½	1995	56,300	2867	146
250	1995	57,700	2882	144
250	1979	57,000	2872	145
200	1974	57,500	2874	144
200	1995	55,100	2858	148
200	1980	54,500	2855	150