rifle cartridge 3d model

Create a realistic 3D model of a .308 Winchester rifle cartridge for display and educational purposes. The model should include the full cartridge: pointed bullet (projectile), bottlenecked casing, extractor groove, and flat base. The projectile should have a smooth ogive curve with a pointed tip. The brass casing should feature a tapered bottleneck transitioning cleanly into the bullet. Include accurate proportions based on a standard .308 Winchester round. Requirements: • Realistic proportions • Clean, smooth surfaces • Single watertight manifold mesh • No internal components • No primer engraving or brand markings If intended for 3D printing: • Solid model (no hollow interior) • Slightly thickened tip for durability • No extremely sharp edges Style: realistic, high-detail display model.