No you cant, I first encountered this problem a few years ago when adding kits to bots in botspawn, if i gave them shotguns loaded with slugs they would spawn with buckshot, the same with any other weapon when "kitted" with HV ammo they would default to standard ammo. If i respawn with a loaded weapon *HV then i retain that ammo, But if i redeem a kit that was created with a loaded weapon with hv it reverts back to standard rifle ammo.
You have the same problem with Turret plugin, if you pick standard ammo as the default and "craft" a turret and place an unloaded weapon on the turret then start to load it with hv you will find that it keeps creating 30 rounds of standard ammo.