Ammo: Does Case Shape Really Matter?

There have been a number of factory and wildcat cartridges that have played with case design. But has it had any real effect on ballistics?

10mm Vs 45 10mm vs 45 acp Side-by-Side Comparison [2022]

True Velocity Polymer Cased Ammunition - RifleShooter

Cartridge Case Designs & Shapes

5.56 vs 7.62x39 - Rifle Caliber Comparison by

Fred Zeglin, Author at Gun Digest

True Velocity Polymer Cased Ammunition - RifleShooter

Steel vs. Brass Ammo: Which is Better? – Silencer Central

True Velocity Polymer Cased Ammunition - RifleShooter

Best Cartridge Designs?, Page 3