Originally posted by HANKA
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For one, the two CMUs looked to me like they were of different construction. If Chris's block was harder or had thicker walls than the block shot by Paul, that could easily account for the different penetration. Such a test needs to use CMUs from the same manufacturer.
Velocity of the Wolf FMJ was clearly too low for that lead-core bullet. I suspect that a 100gr bullet would need significantly higher velocity, even if it were to have a steel core. The air space in the tip might also have been a factor.
IMO, bullets used in testing CMU penetration should all have the same construction. That's why I suggest the Norma 120gr FMJ for comparison with 7.62 M80 Ball. Both have lead cores, with no air space in the tip. Just make sure to use gilding metal jacket M80, not the steel jacket stuff.
For testing a 6.5mm monolithic, I'd argue for a 150gr monolithic of the same make in .308 Win, in order to have an apples-vs-apples comparison.
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