man it could be 1 bullet with 2500 damage with 10 reserve for the 50 cal point sniper skin

I think that's L96 variant that using 7.62X51mm NATO. AWM can use .308 Winchester magnum (still 7.62 family).

Great mod, but the CSS sniper in question is already chambered in .338 Lapua Magnum, so it is the AWM variant already. Just hop in CSS and the in-game stats will confirm this. The CS:GO variant, however, is the famous law enforcement version---the AWP chambered in the "weaker" 7.62×51mm NATO. L4D2 gets its weapons from CSS, so we have a "cannon" damage value for 7000 J of muzzle energy, which is 115 damage. I'm making a "head-cannon/realistic/semi-balanced" Barrett AMR that deals 334 damage per shot, based on muzzle energy conversions. Anyways, nice script.

This is a great mod. Makes the AWP much better without making it too OP.