Check out 8x50R Mannlicher Cartridge 3D model on CGTrader for $2. High-quality mesh by HuanSweet: 2562 polys, 2593 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 19 MB), FBX (Autodesk FBX, filesize: 9.8 MB), MAX (Autodesk 3ds Max, filesize: 9.5 MB), PNG (PNG, filesize: 9.5 MB), JPG (JPG, filesize: 9.5 MB), 3DS (3D Studio, filesize: 9.5 MB)