Mag7LineUp4k2 September 8, 2017 at: 1500 × 1138 In: Preference-Driven vs. Process-Driven Design in the Field of Small Arms Ammunition: Discussion ← Previous Next → Preference-driven design is capable of producing viable, if suboptimal, ammunition solutions. Left to right: .276 Pedersen, .270 British, .280/30 British, .270 Sidewinder, 7x46mm UIAC, .277 USA, 6.86x46mm Romulan