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...assume that the pressures were aso more consistent can i not?
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Honestly not. There are only two ways to determine pressure/consistency:
1. Directly: Pressure/strain gauge (or copper-crusher port) installed on the receiver
2. Indirectly: Chronograph measuring/comparing the
actual resultant bullet muzzle velocities against each other and as-predicted by manuals/internal ballistics programs
Short of primers falling out and ejector slot imprints..., any sound, soot markings, primer-flattening, web-diameter measurements, etc, etc are all inconsistent black art (the improper application of which brought us low-numbered Springfields)
