1000 Rem 6 1/2

Bought 2k of these when they were on sale to use in a .223 bolt gun. Tried 100, and i should have done my research before hand because they are not good for the higher pressure .223 loads i was making. Had pierced primers. Selling off 1000 of them, full box of 10 flats.. best used for lower pressure small primer cartridges. Have 1900 total but was thinking of keeping the 900 for .357. But would trade all 1900 of these for 1000 cci 450's if anyone wants to do that.