I'm going from the damage chart here, and the logic that the guns need to be balanced. If the RoF is high or the amount of ammo is high the damage needs to be lowered a bit. If the RoF is low or the amount of ammo is low the damage needs to be boosted. Also, the suppressor is SUPPOSED to reduce recoil, but also reduce the muzzle velocity of the bullet (shots don't go as far and drop faster). As far as actually reducing the overall damage of the bullet, it's not supposed to touch that. However, there is something in the patch notes about changing the way the suppressor works so it might not work as intended right now. A possible (disclaimer: I'm making this up without ANY facts to base it off of) reason for this is right now suppressors move the entire damage over distance function back a little bit. The min and max damage are the same, but as the bullet flies, it loses energy (damaging potential) faster which makes it seem like medium distance targets take "less" damage. For example, if the max distance for max damage used to be at 10m and the max distance for min damage used to be 250m, the suppressed values would become something lower like 5m and 240m and so the function at which the bullet loses energy would be moved back. Targets that are hit past 240m or before 5m don't notice a damage decrease, but any targets hit between 5m and 240m appear to take less damage because the function's reducing the bullet's energy sooner.