How to select the right grain for 7mm Rem Mag deer loads?

Choosing the Right Powder

When selecting a grain for your 7mm Rem Mag deer load, consider the type of hunting you’ll be doing and the rifle you’re using. For a standard-length action rifle, a 140-grain bullet is a good starting point. This grain weight will provide a flat trajectory and sufficient kinetic energy for taking down deer-sized game. However, if you’re using a short-action rifle or hunting larger game, such as elk, a 160-grain bullet may be more suitable. In this case, the additional mass will help compensate for the rifle’s shorter barrel length and increase the bullet’s stopping power.

Bullet Style and Performance

In addition to grain weight, consider the bullet style and its performance characteristics. For deer hunting, a bonded or hollow-point bullet is a good choice, as it will provide reliable expansion and penetration. When selecting a specific bullet style, look for one with a high ballistic coefficient (BC) to minimize wind deflection and maximize range. For example, the 140-grain Barnes TSX bullet has a BC of 0.565, making it a good choice for 7mm Rem Mag deer loads.

Load Development and Testing

To determine the optimal load for your 7mm Rem Mag deer load, perform load development and testing using a chronograph and ballistic calculator. Start with a starting load and incrementally increase the powder charge until you reach your desired velocity. Be sure to test multiple loads and keep accurate records to ensure reliable performance and consistency. This will also help you identify any potential issues, such as excessive pressure or inconsistent velocities.