nearly all the HMR ammo comes out of the same factory CCI,,,,CCI put the names of the other makes on the boxes at source,,,Hornady had a warning on their site for a few months some time ago telling people that if they had batch number -------what ever it was to send it back for a full refund,,,not replacement a refund,,,CCI then had the same on their site.
so had so much returned they then took the notice of the sites and let it play its self out,,,last year Remington had a notice on their web site asking people to return their ammo batch number ------ for a full refund they also had a notice telling people with HMR rifles to send them back to them for a fault cure.
it is probably time all you chaps that have a problem get on to the importers/ makers and let them know in know uncertain terms you are going to take action if nothing is done,,,,dont forget the sale of goods act covers firearms and ammo as well,,,,as for loss of earnings you may need to consult a legal professional.
paul