[yekimak]

Talking archery.

Arrows are not designed to expand or deposit energy into a target, it woud be a waste. You are talking about a whole 15 (fifteen) foot pounds of energy from a really fast bow. Arrows heads are designed to slice through and cut tissue, and energy that is transfered to the target negates this action.

Arrows do penetrate things, say like a plastic milk jug full of water quite easily, but that is because od a massive sectional density, and the lack of expansion and the propensity to yaw.

All Spire point bullets yaw, and some are designed to take advantage of this effect, like the russian 7.62 which yaws and flattens, making it achieve a more damaging terminal effect.

The 5.56 yaws as well, and does break at the cannelure (though I am not sure that the cannelure breaking was the original intent). Originally the 55 grain 5.56 was fired from a 1-14 twist barrel, giving the bullet enough stability to fly straight in the air, but caused it to destabilize quickly when it transitioned into another medium. Heavier bullets and tracer designs, as well as poor cold weather performance if the 1-14" twist barrels led to faster twist rates, like the 1-7" common in the military now.

the round nose bullets of FMJ .45acp and 9mm do not yaw as easily and, in that case, a bigger hole is desirable.