11×67

11x67 refers to a specific ammunition designation, most commonly associated with a type of shotgun shell. The "11" typically indicates the gauge of the shotgun, although it is an unusual gauge designation. Shotgun gauges are usually expressed as a number representing how many lead balls of a specific diameter would be needed to weigh one pound. Common gauges include 12, 16, 20, and 28. The "67" likely refers to the length of the shotgun shell casing, measured in millimeters. Therefore, 11x67 would describe a shotgun shell with an 11-gauge designation and a 67mm casing length.

The 11-gauge designation is not standard in modern firearms. Historically, some firearms might have used less common gauge sizes, but they are rare today. The 67mm casing length is also relatively short compared to common modern shotgun shell lengths like 70mm (2 ¾ inch) or 76mm (3 inch). Ammunition designated as 11x67 is therefore considered uncommon and would likely be found in specialized or antique firearms. Information on the specific ballistics, types of projectiles, or manufacturers producing 11x67 ammunition is scarce due to its rarity. Collectors of antique firearms or specialized ammunition might encounter this designation.