What @meTaLiCroSS said make totally sense, since I did without orpheu and looks working. I needed to "recode":
Code:
CBasePlayerWeapon::DefaultReload
CBasePlayerWeapon::ItemPostFrame
to manage iMaxClip (I didn't even try AddPrimaryAmmo yet). To manage iMaxAmmo1 I'm still getting some trouble in "buy primary ammo" at buy menu.