.40-70 Maynard 1873

Monday, July 29th, 2019

.40-70 Maynard 1873

Dr. Edward Maynard was a dentist and inventor, and over the course of his life had 23 patents for cartridges and priming systems. He was issued his first patent in 1845 for the development of a tape priming system for the military. The priming system used a magazine from which a paper roll advanced a charge over the nipple as the gun was cocked. His intent was to increase the rate of fire, by a shooter, as they would only have to concentrate on loading their rifle. The British cavalry used this system during the Crimean War but found it too unreliable in wartime conditions.

Maynard continued his inventions and soon developed a .48 caliber breech loader. It was tested by the military and was accurate up to 500 yards. It was considered the best breech loader test at that time. In 1857 the Maynard Arms Company began manufacturing .35 and .50 caliber rifles and interchangeable smooth bore shotgun barrels could be purchase with the rifle. Both Union and Confederate forces used the Maynard rifles and were used by sharpshooter for long range shots.

The Maynard rifles used a distinguishable a large “dinner plate” cartridge during the Civil War. In 1873 Maynard redesigned his cartridges and again used an unconventional design. These cartridges were said to resemble a “frying pan”. The reason for the large cartridge heads were to easily extract a fired cartridge from a rifle. Black powder, at this time, was dirty and would quickly foul a chamber.

The .40-70 Maynard 1873 is capable of propelling a .417” dia. bullet at 1,645 fps with 1,622 ft.-lbs. of energy. The pictured are both an original .47-70 Maynard 1873 and the RCC .40-70 Maynard 1873 we recently manufactured.

Roberson Cartridge Company is a custom manufacture of Vintage, Obsolete, Hard to Find and Wildcat calibers.

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