Quick Answer
For optimal performance with controlled expansion bullets, use a load data that matches the manufacturer's recommendations, typically in the 40-50 grain range for .308 Winchester and 60-70 grain range for .30-06 Springfield.
Recommended Load Data
When choosing a load data for controlled expansion bullets, consider the specific weight and type of bullet, as well as the rifle’s chamber pressure and barrel length. For example, in a .308 Winchester chambered rifle, a 165-grain controlled expansion bullet performs well with a load data of 43.5-46 grains of H4831 powder, with a maximum pressure of 52,000 psi. Similarly, in a .30-06 Springfield chambered rifle, a 180-grain controlled expansion bullet performs well with a load data of 65-68 grains of H4350 powder, with a maximum pressure of 60,000 psi.
Factors Affecting Load Data
Several factors affect the optimal load data for controlled expansion bullets, including the bullet’s weight, type, and manufacturer. Additionally, the rifle’s chamber pressure and barrel length can also impact the optimal load data. It’s essential to consult the manufacturer’s recommendations and follow established reloading practices to ensure safe and accurate performance. For example, the Sierra MatchKing 155-grain TMK bullet performs well with a load data of 45.5-48 grains of Varget powder, while the Hornady ELD-X 178-grain bullet performs well with a load data of 62-65 grains of Varget powder.
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