Quick Answer
Barrel length can affect the performance of a .325 WSM rifle for elk, with longer barrels often resulting in increased velocity and energy retention, but this relationship is influenced by other factors, such as twist rate and rifle weight.
Barrel Length and Velocity
The .325 WSM cartridge benefits from a longer barrel to achieve optimal velocity and energy retention for elk hunting. A 26-inch barrel is a good starting point, but a 28-inch or 30-inch barrel can provide an additional 100-150 fps (feet per second) of velocity at 300 yards. For example, a .325 WSM cartridge loaded with 150-grain bullets can reach 3,120 fps at 300 yards in a 28-inch barrel, compared to 2,960 fps in a 24-inch barrel.
Twist Rate Considerations
While longer barrels can improve velocity, a slower twist rate can be necessary to stabilize longer bullets. A 1:12 twist rate is typically suitable for 150-grain .325 WSM bullets, but a 1:10 twist rate may be necessary for heavier bullets. A slower twist rate can also help reduce barrel stress and increase barrel life.
Rifle Weight and Balancing
A rifle’s weight and balance can also affect its performance when hunting elk. A heavier rifle with a longer barrel can help stabilize the bullet and improve accuracy, but it can also make the rifle more tiring to carry. A balanced rifle with a well-distributed weight can help mitigate this issue, making it easier to use the rifle for extended periods.
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