If three cartridges have identical case capacities and are loaded to identical pressures using the same powder/bullet/primer in identical rifles, wouldn't they have identical velocities?
For example: the 6mm-06 (water grain capacity 92gr), the 6mm/284 (water grain capacity 90gr), the 240 Wby Mag (water grain capacity 90gr) if chambered in identical 26" barrels and loaded to identical pressures with the same powder, primer and bullet. Isn't it reasonable to expect identical velocities?
That assumption certainly felt reasonable to me, but I wondered what the differences would be � not just the similarities � so I ran the numbers on the computer.
� 6mm cartridge with 90 grains capacity, 95-grain Nosler Partition, Hodgdon H-870, and Pmax 60,000 lb/sq in.:
80.4 grains � 3,544 ft/sec
� 6mm cartridge with 92 grains capacity, 95-grain Nosler Partition, Hodgdon H-870, and Pmax 60,000 lb/sq in.:
81.5 grains � 3,545 ft/sec
Close enough?
