So this is the response I got.
Dominic,
This is not uncommon for any manufacturers brass. Cartridge case preparation should be done anytime you buy new brass. Flash hole reaming , primer pocket uniforming , case neck sizing ETC. Need to be done before any loading of the cartridge case is started. The trick is getting the proper tools. For flash hole deburring for the .060 flash hole of our 6.5 CREEDMOOR cartridge cases or for any cartridge case with that size flash hole. I suggest you use the SINCLAIR INTERNATIONAL FLASH HOLE REAMING TOOL # 749-005-418. For primer pocket uniforming ( small rifle) get the 749-003-709 small rifle/pistol carbide primer pocket uniformer and either the 749-001-607 handle or 749-001-880 power screwdriver adaptor ( I suggest this one). These tools will help remove the burrs , properly size the flash hole so your decapping pin in your die does not stick and uniform the primer pocket depth for more consistant ignition (this should be done with each reloading of the cartridge case. Flash hole deburring just needs done one time) Another great source for quality reloading tools is PMA TOOL on the web! Hope this helps Dominic. If you have any more questions please feel free to contact us at any time!
Take care,