Quick Answer
When selecting a primer for 6x47 Lapua loads, factors such as the desired velocity, case headspace, and powder sensitivity come into play. The type of primer, including its composition and spark energy, also affects load performance.
Primer Composition and Sensitivity
When loading for varmint hunting with 6x47 Lapua, it’s essential to consider primer sensitivity, particularly if using fast-burning powders like Varget or N340. These powders can be quite sensitive to primer energy, so a high-velocity primer like Federal 210 or CCI 250 is often a good choice. This reduces the risk of primer blowback and ensures consistent ignition.
Case Headspace and Primer Size
Proper case headspace is critical when loading for the 6x47 Lapua. A primer that’s too large can cause excessive headspace, compromising the rifle’s accuracy. Conversely, a primer that’s too small can lead to inconsistent ignition. To avoid this, use a primer that’s specifically designed for the 6x47 Lapua case, such as the Remington 9 1/2 or the Winchester WLR.
Velocity and Power Output
The desired velocity for 6x47 Lapua loads can also influence primer choice. For example, if you’re aiming for high velocities over 2,800 fps, a primer with a higher spark energy, such as the Remington 9 1/2, may be necessary. This ensures reliable ignition and consistent power output, even at high velocities.
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