NORMA Bossoli 7x64mm Brenneke #20270121 (100pcs)

Norma products are known worldwide for their high quality. Cartridge cases are an important factor in this reputation. The superior quality ensures long service life and many reloads. Norma cases are made from the best possible raw materials and with the tightest tolerances, providing precision round after round. The case neck is annealed to become softer. This prevents gas leaks and allows the case to hold the bullet firmly for at least 10 years without cracking due to material aging. Further down on the case, the hardness increases to avoid unnecessary stretching. If it is too hard, there is a risk of cracks. Further down, around the primer pocket, the brass should be solid. Here, the hardness is almost twice that around the neck. The material structure reveals the hardness. During processing, large soft grains break down into smaller grains, which makes the material harder. During annealing, the small grains become larger and the hardness decreases.