let me explain you how sound modding works
theres a 'bank' for each group of sounds, for example bank 137 includes weapon sounds and similar sounds
now each 'bank' has space limit, so if you (for example!) go over 50 mb, other sounds start breaking up and get bugged, for example when you hit someone you hear a car sound etc
if you replace a weapon sound with a sound which weights 2x the original sound you'll also have to edit other sounds to reduce their sounds to balance the mod so it doesnt go over the limit thus it has no bugs