Are 150gr loads effective for tracking running deer with .308?

Terminal Performance

When it comes to tracking running deer, the primary concern is the bullet’s ability to expand and retain its weight upon impact. A 150gr load may not always provide the best expansion, especially when compared to heavier loads like the 165gr or 180gr options. For example, the 150gr FN 150gr PSP (Pointed Soft Point) may not expand as much as the 165gr Nosler E-Tip or the 180gr Sierra GameKing.

Kinetic Energy and Velocity

However, a 150gr load can still deliver a respectable kinetic energy and velocity. The .308 Winchester cartridge is capable of producing velocities in excess of 2,600 ft/s with a 150gr bullet, which can result in a significant amount of kinetic energy transfer to the deer. For example, a 150gr bullet traveling at 2,600 ft/s can produce over 1,400 ft-lbs of kinetic energy.

Hunting Reality

In hunting reality, a well-placed shot with a 150gr load can still result in a quick and humane kill. The key is to aim for the vitals and ensure a solid shot placement. Aiming for the heart or lungs with a 150gr load can result in a quick kill, even if the bullet does not expand as much as desired. This is especially true for smaller deer, where a smaller bullet can be sufficient to penetrate to the vitals and cause significant damage.