Not sure if you posted pics of the Winchester 150gr cases (thread now quite long) but I assume from your first posting that those cases showed absolutely no signs of the Hornady issue. In that case, when you go to the gun shop, belabour the fact that the factory Winchester gave no problems whereas the Hornady did. Take the Win brass with you.
And unfortunately (and I hope I am wrong here) be prepared to have them try and fob you off. If possible take a mate with you to just watch and listen.
Sorry, my paranoia coming thru ha ha.
Good luck.
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