Quick Answer
Different powders can significantly impact the velocity of a 28 Nosler cartridge, with some powders increasing velocity by up to 100 fps over others. This is due to variations in burn rate, pressure, and expansion rates.
Burn Rate and Pressure
The velocity of a 28 Nosler can be significantly influenced by the burn rate of the powder used. A slower-burning powder allows for a more progressive burn, which can increase pressure and velocity. For example, using Hodgdon Retumbo (burn rate: 0.0007 inches/second) can achieve velocities of over 3,100 fps in a 28 Nosler, while Hodgdon H1000 (burn rate: 0.0005 inches/second) may result in velocities around 3,000 fps. It’s essential to choose a powder that matches the rifle’s action and barrel to optimize performance.
Expansion Rates and Viscosity
Expansion rates and viscosity also play a critical role in determining the velocity of a 28 Nosler. Thicker, more viscous powders like Alliant Reloder 33 (expansion rate: 0.005 inches) can result in slightly lower velocities but may offer improved stability and accuracy. In contrast, thinner, less viscous powders like Hodgdon Varget (expansion rate: 0.004 inches) can achieve higher velocities but may produce more recoil.
Real-World Examples
In real-world applications, the choice of powder can be critical in achieving optimal performance in long-range shooting. For instance, a 28 Nosler with a 26-inch barrel and a 150-grain bullet can achieve velocities of over 3,100 fps with Hodgdon Retumbo, making it an excellent choice for long-range hunting. Conversely, a 28 Nosler with a 24-inch barrel and a 160-grain bullet may benefit from the added stability of a powder like Alliant Reloder 33, resulting in improved accuracy and a slightly lower velocity of around 3,000 fps.
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