223 Sizing Die Tests
This video details an advanced reloading experiment comparing the impact of different sizing dies on cartridge runout and accuracy for the .223 Remington caliber. The instructor meticulously tests Lee, Redding, and Mighty Armory dies, along with various expander types, to quantify their effect on concentricity. The results are then correlated with 10-shot group performance at 100 yards, revealing surprising insights into how die choice can influence precision, while also highlighting the potential impact of barrel heat on group consistency.












