Modifying Guns to Fire Larger Ammunition: A Comprehensive Guide

While the question of whether to modify a gun to handle larger ammunition arises, the answer depends heavily on the type of firearm and the extent of the modification required. With enough time and resources, almost anything is possible, but the practicality and safety of such modifications must be carefully considered.

Rifles

Rifles, particularly bolt-action models, offer a higher degree of flexibility in terms of ammunition capabilities. For instance, taking two Mauser 98 actions and welding them together to create a magnum-length action has been done, but these processes are not cheap, quick, or easy. Modifying an original 57mm length case rifle to handle a 300HH cartridge with an overall length of 91mm or a 416 Rigby with a 95mm OAL is a complex and often debated topic in the firearm community. It is generally considered risky and impractical.

Pistols

Pistols offer more variability, especially when it comes to calibre conversions. Some pistols are designed with larger frames, allowing for the chambering of larger cartridges. For example, the Tanfoglio Witness series can be modified to shoot 10mm instead of 9mm by simply swapping parts. However, the process of cutting, welding, or machining to adapt cartridges up to specific lengths (like the Mauser example) is not only difficult but also not economically viable for most enthusiasts.

Revolvers

Revolvers provide the least flexibility and are the most challenging to modify. The length of the cylinder and the internal dimensions of the cylinder itself limit the ammunition options. While it is possible to convert a revolver to shoot a larger diameter ammunition type, the overall length remains constant. For instance, companies like Linebaugh Custom Sixguns offer such modifications, but the process is complex and may not be worth the effort for most individuals. Again, considering the time, cost, and safety, it is often more practical to purchase a revolver chambered for the desired cartridge.

Limited Flexibility in Semi-Automatic Pistols, Shotguns, and Rifles

In semi-automatic pistols, shotguns, and rifles, the most significant limitation comes from the magazine size and internal dimensions of the receiver. There are some conversion kits available, but they are limited by the original design. In shotguns and rifles, the specific model and its receiver's length determine the feasibility of modifications. Bolt-action rifles and shotguns, such as the Remington XP-100, face limitations based on the length of the receiver and the strength of the receiver when handling larger caliber cartridges.

Single Shot and Break-Open Rifles

Models like single shot, break open, falling block, and rolling block firearms can be modified more easily. Rechambering alone can allow shooting longer cartridges of the same calibre. With additional modifications, they can handle a wide range of cartridges. Thompson Center Contender pistols, for example, can fire everything from the smallest center fire cartridges to the largest with a simple change of the barreled receiver. The key factor here is the strength of the receiver when using larger cartridges.

Conclusion: The decision to modify a firearm should be approached with caution and thorough research. While some modifications are possible, they often come with significant costs and safety concerns. It is generally more practical to choose a firearm specifically chambered for the desired ammunition or to opt for a conversion kit designed for those specific needs.

Key Takeaways:

Rifles and shotguns are the most challenging to modify due to receiver limitations. Pistols offer some flexibility but are often not economically viable for minor modifications. Revolvers are the most difficult to modify, making it safer and cheaper to purchase a suitable revolver. Military or specialized guns may have unique conversion options.

Remember, modifying firearms for larger ammunition requires extensive knowledge and experience in firearm modification. Always prioritize safety and consult with a professional gunsmith if you are considering such modifications.