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  • Ammunition Articles
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Ammunition Articles
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Pinfire Ammo for Sale
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Ammunition

Eley Bros Factory Drawings for Pinfire Cartridges

October 4, 2020 by Aaron Newcomer 3 Comments

Here is a selection of factory drawings/blueprints for how Eley Bros made pinfire cartridges. These blueprints date to the early 1900s.

Eley 5mm pinfire cartridge drawing

First up is the 5mm pinfire cartridge drawing. There is a lot going on here! It lists the dimensions for the bullet, the pin, the percussion cap and the case. They also give all of the dimensions in imperial units though these cartridges were always sold by their metric designation, “5mm.”

The bullet is described of being made of 98% lead and 2% antimony. The antimony was an additive used to harden the alloy. It was a hollow bullet with an overall diameter of .207 inches, or 5.258 millimeters. It had an overall height of .300 inches or 7.62 millimeters. The bullet weight is 18 grains and the powder charge is listed as “about 1.5 grains.”

5mm Eley Pinfire Cartridges

This matches up closely with examples in my collection which have a bullet weight of 18.0 grains and a powder charge of 2 grains. The overall weight is 35.2 grains.

The brass case is listed to have a mixture of 70% copper and 30% zinc to make up the alloy they used. The case had an overall length of .450 inches or 11.43 millimeters. They give the exact specifications of where to put the hole for the brass pin and even what angle the pin should be placed in the cartridge to ensure the hammers get the best hit.

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About me

Hello, my name is Aaron Newcomer. I am a collector and researcher of early 19th century breech-loading firearms systems, with a particular focus on the work of Jean Samuel Pauly and Casimir Lefaucheux. I collect cartridges and documents related to these types of firearms and conduct research on these topics, furthering my understanding and knowledge of these historical firearms and their place in the evolution of firearms technology. My collection and research reflect my dedication to preserving and understanding the history and technical innovations of these early firearms systems.

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