Winchester unprimed shell cases are engineered to precise tolerances to ensure smooth feeding and positive chambering.
| Attribute | Value |
| Type | Unprimed Case |
| Material | Brass |
| Size | .40 Cal |
| Style | Large |
| Caliber or Gauge | 40 Smith & Wesson |
| Quantity | 100 Per Bag |
| Manufacturer Part Number | WSC40SWU |
