FastCup servers run at specific tick rates. If your rates are wrong, your shots won't register, and you will die behind walls.
// ---- Sound ---- volume 0.7 suitvolume 0 hisound 1 bgmvolume 0 voice_enable 1 voice_scale 0.8 s_eax 0 s_a3d 0 s_doppler 0 s_occ_epsilon 0 s_verbwet 0 s_refgain 0.5 s_refdelay 2 s_occfactor 0.25 s_occlude 0 s_reverb 0 s_skipviz 1 cs 16 cfg fastcup top
// Network settings – FastCup allows up to 25000 rate "25000" cl_updaterate "101" cl_cmdrate "101" cl_rate "20000" ex_interp "0" cl_smoothtime "0.01" cl_lc "1" cl_lw "1" FastCup servers run at specific tick rates