they are in the business of loading ammo, so more than likely they have the brass made for them by some supplier who probably supplies for a lot of ammo manufacturers. try them out and see how good the brass is, then give an update about it.
i buy my brass in bulk from Midway. unprimed once fired from winchester, remington, starline or federal. i run them through my resizer, deburr the primer pocket, check and adjust the OAL, chamfer the neck and reload. if looking for brass for reloading, check out Midway. they have great service, decent prices and fast shipping.