Quick Answer
Full length sizing provides tighter case neck-to-chamber fit and prevents excessive case stretching, resulting in better accuracy and consistent pressures. Neck sizing alone may lead to over-working the case, causing excessive wear and potential chambering issues. This can compromise the integrity of the cartridge.
The Importance of Full Length Sizing
When hand loading ammunition, it is crucial to consider the benefits of full length sizing versus neck sizing. Full length sizing involves sizing the entire case to the chamber dimensions, including the shoulder and body. This process helps to maintain a consistent neck-to-chamber fit and prevents excessive stretching of the case. According to the National Rifle Association (NRA), excessive case stretching can lead to inconsistent pressures, reduced accuracy, and even catastrophic chambering failures.
Case Life and Chambering Issues
Neck sizing alone can cause the case to become over-worked, leading to excessive wear and potential chambering issues. This can compromise the integrity of the cartridge and affect its performance. It is recommended to use a full length sizing die with 0.001 to 0.002 inch of clearance between the die and the case shoulder to prevent over-working the case. This clearance allows for a smooth, even sizing process without compromising the case’s integrity.
Sizing Techniques and Tools
When sizing cases, it is essential to use a high-quality full length sizing die and to follow proper sizing techniques. This includes using a suitable sizing die, proper lubrication, and controlled pressure. A good rule of thumb is to size cases in stages, using a combination of full length and neck sizing, to achieve the desired level of precision and accuracy. This approach helps to prevent over-working the case and ensures that the ammunition meets the desired performance standards.
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