hmm as far as i know there are cvars to adjust explosive headshots and such
i will look into this....also have u tried switching the ammo type to get what your looking for?
not sure if that will help. u shouldnt need the use of a plugin though...im pretty sure theres a way to do it...
This is for TF2, not L4D/L4D2.
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Not currently working on SourceMod plugin development.