A couple more questions:
Does a M193 or M855 round that tumbles, but doesn't fragment, does it make the 12" depth? If so, out to what range, say from a 16" barrel?
Is there an envelope where fragmentation occurs but depth is comaparatively shallow (undesirable), but once velocity decreases some more, fragmentation ceases but penetration depth increases back to the 12" desired depth (since the bullet is now holding together)? If so, what would be more desirable, say fragmentation with 8" depth or no frgamentation but 12" depth?
Also, does anyone have the BT Ammolab's tests of M193 gel pics saved off? Neither that test nor the M855 test are linked to their site anymore. From what I could tell about the other tests, they were run at full velocity rather than downloading to simulate impact at fragmentation velocity thresholds.