Secondly, I have always questioned the use of hardball ammo for combat. I know the rationale is that one bullet might go through several bad guys but I'd rather be sure to clobber the guy I'm aiming at (HP or SP).
I thought the theory was to drill a neat hole, and tie up one or more buddies or corpsmen to rescue and care for the wounded.
A quick kill only removes one enemy.
On the matter of the FMJ 7.62, I had read that some Warsaw Pact ammo had a hollow in the lead filling, just at the point. Upon impact, the point would irregularly collapse, causing the bullet to tumble within the target..Yet it was still fully jacketed.
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The carbine round should be extened 1/8 inch with new more powerful powder and a slightly heavier slug. The old carbine round will go through 15 inches of pine and still be lethal. It will also burn through 1/8 inch slightly hardened steel and remain lethal.
One of the original war conventions, back in 1898, prohibits the use of anti-personnel ammunition that expands. While it was originally aimed at dum-dum bullets and WP bullets, it's been pretty much universally accepted that hardball is the only way to go.
The Hague Convention. We don't use nerve gas either.