When it comes to cartridges for firearms, understanding the size and dimensions is essential for proper usage and compatibility. In this article, we will delve into the specifics of the .338 RUM (Remington Ultra Magnum) case size. From bullet diameter to case length, we will cover all the important details. So, let’s get started!
Bullet Diameter and Cartridge OAL
The .338 RUM is known for its impressive power and accuracy, primarily due to its bullet diameter of 0.338 inches. This provides it with a significant diameter, making it an excellent choice for long-range shooting and hunting.
Additionally, the maximum overall length (OAL) of the .338 RUM cartridge is set at 3.600 inches. This specification is crucial to ensure proper feeding and chambering in firearms designed for this specific cartridge.
Case Length and Trim Length
When it comes to case length, the .338 RUM has a maximum case length of 2.760 inches. This measurement helps determine whether the case is within acceptable limits and avoids potential issues with chambering and extraction.
For maintenance purposes, it is important to note that the recommended trim length for a .338 RUM case is 2.750 inches. Keeping the case trimmed within this range contributes to consistent performance and reliable functioning.
The Remington Connection
The .338 RUM is predominantly associated with Remington, a renowned firearms manufacturer. It is commonly manufactured using Remington brass, offering consistent quality and reliability.
Priming with Remington 9 1/2M
When reloading the .338 RUM, it is recommended to use Remington 9 1/2M primers. These primers are specifically designed for large magnum cartridges, providing reliable and consistent ignition for optimal performance.
Test Barrel Specifications
During testing and development of the .338 RUM, a Wiseman test barrel was utilized. This test barrel had a length of 24 inches and a barrel twist rate of 1-10 inches. These specifications influenced the performance characteristics of the cartridge.
Following Recommended Loads
It is crucial to follow recommended loads when reloading the .338 RUM. Loads that are below the minimum charges shown should be avoided as they may not provide consistent results or could potentially be unsafe.
Never Exceed Maximum Load
One of the most critical aspects of reloading any cartridge is to never exceed the maximum load recommended by the ammunition manufacturer. Doing so can have severe consequences, including damage to the firearm or personal injury. Always prioritize safety and adhere to recommended guidelines.
In Conclusion
The .338 RUM is a powerful and versatile cartridge that offers exceptional performance for long-range shooting and hunting. Understanding its size and dimensions is essential for reloading and ensuring compatibility with firearms designed for this specific cartridge. Remember to adhere to recommended loads and prioritize safety above all else. Happy shooting!
