Description
25mm Experimental "Long" Round from General Dynamics Ballistics Laboratory
Item Overview
This experimental 25mm "Long" round is attributed to the General Dynamics Ballistics Laboratory. It represents the research and development work required to test new medium-caliber ammunition designs before production or military acceptance. Its unusual extended configuration makes it an important display piece for studying experimental ordnance development.
Identification and Features
Caliber: 25mm
Item type: Experimental laboratory round
Configuration: “Long” round
Attributed organization: General Dynamics Ballistics Laboratory
Purpose: Ammunition research, testing, or development
Exact model: Not identified
Cartridge dimensions: Not confirmed
Weapon application: Not confirmed
Experimental Laboratory Role
Ballistics laboratories produced and evaluated test ammunition during the development of new projectiles, cartridge cases, propellants, and gun systems. Experimental rounds could be used for dimensional checks, feeding trials, chamber testing, pressure evaluation, velocity studies, or projectile-development work. Without its original test records, the exact purpose of this example cannot be confirmed.
“Long” Configuration
The word “Long” describes this round’s extended configuration but has not been verified as a formal military cartridge designation. No evidence currently connects this example to one specific 25mm case length, projectile type, or weapon. It should not be identified as an M919 long-rod cartridge, 25×137mm round, or another standardized model without supporting dimensions or markings.
Historical Background
General Dynamics became a major developer and supplier of medium-caliber ammunition for ground, naval, and aircraft weapon systems. Its 25mm work included armor-piercing, high-explosive, target-practice, and advanced long-rod projectile designs. Laboratory specimens preserve an early stage of this process and may differ greatly from the standardized cartridges that later entered production.
Condition
This experimental military-surplus item may show scratches, finish wear, discoloration, oxidation, machining marks, laboratory handling marks, or other signs of age and testing. Its exact date, material, internal construction, loading status, and test purpose have not been confirmed. This listing is for the experimental round only; test fixtures, laboratory records, ammunition packaging, weapons, and other components are not included unless specifically pictured or stated.
Ideal For
This experimental round is well suited for General Dynamics collections, ammunition-development displays, ballistics research exhibits, military museums, ordnance identification collections, and advanced medium-caliber ammunition study.
Approx length 10", Approx width 1.5", Approx height 1.5", Approx weight lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item’s general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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