CCI primers are more sensitive, easier to seat, and more compatible with progressive loading equipment than ever before. 450 Small Rifle Magnum and the BR2 and BR4 are popular amongst the High Power crowd. No. 34 and 41 primers meet NATO sensitivity requirements. No. 35 is Mil-Spec. All are 1000 per package, except 50 BMG.
REMEMBER: There is a UPS Hazardous charge per package for powder or primers. Powder and primers may be shipped together in the same package. Powder, primers or ammunition may NOT be shipped out of the United States.
Big Book Catalog, Issue:67, Page:526
Sinclair, Issue:4A, Page:117