Sierra BlitzKing Bullets BlitzKing bullets are designed for explosive expansion in varmints and small game with accuracy characteristics similar to the MatchKing target bullets. BlitzKing bullet tips are made of a proprietary acetyl resin compound, and the copper jackets are thin for enhanced accuracy and explosive expansion.
Big Book Catalog, Issue:68, Page:542
Sinclair, Issue:5B, Page:100
Sinclair, Issue:5B, Page:101