Blown primers - Nosler Bulk Rifle Brass .223 Remington

I bought a bag of these and loaded them to Sierra accuracy load data for 77 SMK. Out of about 100 rounds I had 12 blown primers clear out of the pockets on the first loading. During my 50+ years of shooting I have not had a total of 12 blown primers until I used these Nosler bulk cases. But getting 12 blown primer from 1 bag of brass is unthinkable. I never exceed the recommended load data. I also experienced dozens of badly flattened primers, also on the first loading, on loads that showed rounded primers with other brass. My bag of Nosler bulk brass was unusable. This issue does not in any way reflect on Optics Planet, who are great to work with and I still do. I’ve used Starline, LC, FC. Frontier, Sig, Lapua brass and general range pick up brass and never had this problem. This is strictly poor quality on Noslers part.