I tried the other weapons having ammo thing already, and I'm using the latest version of the weapon pack
The most recent version (the beta release; should only contain like 6-9 weapons) had RTB implementation, apparently that stuff broke down super hard and has frazzled a lot of the global vars; some of which control features
which have not been fully implemented.Put these in your server console and see if that helps.
$Pref::RYG::LimitedAmmo = 0;
$Pref::RYG::ReloadingEnabled = 1;