I've got no clue as to who owns the rights to the Herter's name. I did business with them decades ago when they were independent.
If the patents are still in force, Federal owns the rights to the nylon jacket technology-which orginally was developed to reduce lead exposure on indoor ranges. CCI does aluminum cases and both are owned by ATK. I'd kinda think it may be a special run under contract from whoever owns the Herter's name.
And yep, it's a whole lot cheaper than many of the various types of 'green' ammo intended to minimize hazardous range conditions.