I don't believe he will be replying to your post.There is no best round.
Each and every round has its pros and cons.
5.56 despite its size is a highly effective round. Their are anecdotes of failure, but there are the same anecdotes for every round.
Bullets have three jobs:
1) make holes for blood to leak out of
2) Destroy the CNS
3) break bones so you get follow upshots.
No rifle or pistol bullet will always work. Put one through some thigh meat and it will hurt, but it won't stop a motivated person, doesn't matter if its a 50bmg, unless it hits something important no bullet "works"
In pistols expansion is a two-edged sword. Bigger hole, but less penetration. Pistol rounds are borderline on penetration anyway...
Bottom line is 5.56 will make holes for you bleed out of just fine. It will effectively disrupt the CNS and will break bones. It checks the boxes even out a few hundred metres.
Is it lighter than other bullets? Yes. Does that matter, not really for short range.
Is it a smaller diameter? Yes. Does diameter matter? No, not if it hits the goodies.
5.56 is cheap, light recoil and checks the boxes. More is better sure, but good enough is still good enough.
Sent from your mom's house using Tapatalk