Based in Sedalia, Missouri since 1990, Sierra manufactures a very wide range of bullets for both rifles and pistols.

[1] In the late 1940s, three aircraft machinists, Frank Snow, Jim Spivey and Loren Harbor, rented space from Clint Harris in the Harris Machine Shop in Whittier, California to produce precision rivets for the aircraft industry, along with fishing rod guides and rifle front sight ramps.

Before long, the company outgrew that facility and rented a large Quonset hut in Rivera, California.

Hayden was a mechanical engineer who was working for Remington Arms at Lake City Army Ammunition Plant at the time.

In the late 1980s, California was beginning to be unfriendly to the manufacturing business with new strict regulations and higher taxes.

The land was purchased and a 300-meter underground test range was built with a 45,000 square foot manufacturing plant on top of it.

They employ about 160 people with 5 full-time Ballistic Technicians answering reloading and firearms questions on a daily basis.

As such, they are normally smaller calibers, and are designed for rapid expansion, and need to be accurate to hit the typically small targets.

[6][7] The Pro-Hunter is a flat-base bullet with a special jacket to provide deep penetration and maximum expansion on large game such as elk.

The Sports Master is a handgun bullet with a hollow-point to facilitate good performance for hunting and defense.

Tournament Master bullets are full-metal jacket and designed primarily for competition and recreational shooting.