Many hunting stores don't re-stock after-Christmas muzzleloading accessories until June. Many others won't want to carry (2) Remington 209 primers ..ie.. STS and Kleanbore - so these new ones may be slow arriving. Also... rumor has it that Hodgdon will also package these under their name. We'll see how it all shakes-out around mid-year.... also see how 777 pellets react to them internally.