# Ammunition Lot Variation and Why It Matters for Consistent Shooting Ammunition is produced in batches known as lots, and performance can vary slightly between them. This variation is an important consideration for shooters who rely on consistency. 9mm ammo is produced in high-volume lots, and modern manufacturing reduces variability to maintain consistent handgun performance. ... https://bulkammotogo.com/product-category/223-remington-ammo/