Can't Here Bullet Impact On Players? Solved
 

The problem lies within the TIK files that come with blood mods. Most blood mods have this problem, but I am currently working on a new one so that you can hear bullet impacts on players while still seeing blood. The only blood mod that I know of that has this is CrizzBlood 2.1 (and pretty soon mine).

If you have a mod that you think will conflict with sounds of bullets that hit you add this line to the TIK:

sfx sound snd_bh_flesh auto 1.5 128 0.8 0.2

Good find. Thanks for the information.