This refers to a detachable box magazine designed to hold four cartridges of .30-06 Springfield ammunition, specifically for use with the Remington Model 7400 semi-automatic rifle. The .30-06 Springfield cartridge is a widely used hunting and military round known for its power and versatility. The Remington Model 7400, a popular choice among hunters, offers a rapid-firing capability, making the magazine capacity an important factor.
A four-round capacity offers a balance between firepower and manageable size for hunting scenarios. Hunters value the ability to quickly fire follow-up shots if necessary, and a four-round magazine, combined with one round in the chamber, provides a reasonable capacity for most situations. This capacity also aligns with many hunting regulations that limit magazine size. Historically, the Model 7400 and its predecessors have been chambered in .30-06, making it a classic pairing for this popular cartridge.