Are There Specific Techniques for Reloading for Accuracy?

Question

Accepted Answer

Precision Powder Measurement When reloading for accuracy, it’s crucial to precisely measure the powder charge. To achieve this, use a calibrated powder scale that measures in 0.1-grain increments. I prefer the Lyman digital powder scale, which allows for consistent and repeatable measurements. For most hunting cartridges, a powder charge of 0.1 to 0.2 grains above or below the minimum recommended load can make a significant difference in accuracy. For example, a 6mm Creedmoor load with 45.5 grains of Hodgdon H4350 powder might be optimized at 46.3 grains.
Die Selection and Use Selecting the right die set is critical for achieving consistent case neck tension and precise bullet seating. I recommend using a set of precision-made RCBS or Lyman dies, which offer a smooth, consistent operation. When seating bullets, use a precise seating die with a calibrated depth gauge to ensure the bullet is seated to the correct depth. For example, in a .243 Winchester, seating the bullet 0.003 inches off the lands can make a significant difference in accuracy.
Case Preparation and Inspection Proper case preparation and inspection are essential for achieving accuracy. Use a high-quality case trimmer to trim cases to a uniform length, and inspect each case for any signs of excessive wear or damage. Use a precision case gauge to verify the case length and ensure it meets the minimum requirements for the specific cartridge. Additionally, inspect the case neck for any signs of excessive stretch or damage. Cases that show excessive wear or damage should be discarded to ensure consistent accuracy.