As September 2021, the top ammunition manufacturers by sales can change over time due to market fluctuations and mergers and acquisitions. However, some of the well-known ammunition manufacturers that have historically held top positions in the industry include:
1. Federal Premium Ammunition (a subsidiary of Vista Outdoor): The big dawg, Federal Premium is known for producing a wide range of ammunition for various purposes, including hunting, sport shooting, and self-defense.
4. Hornady Manufacturing Company: Hornady is recognized for its precision ammunition and bullets. They are popular among precision shooters, hunters, and competitive shooters.
5. CCI (Copper-Clad Inceptor) Ammunition (a subsidiary of Vista Outdoor): CCI is known for its rimfire ammunition, particularly .22 LR, used for plinking, target shooting, and small-game hunting.
6. Fiocchi Ammunition: Fiocchi is an Italian ammunition manufacturer with a presence in the U.S. market. They offer a variety of ammunition types, including shotgun shells and centerfire ammunition.
Please note that the rankings and market shares of ammunition manufacturers can change, and new players may enter the market. I recommend checking the most recent industry reports or market analyses for the latest information on ammunition manufacturer sales rankings.