Underwood Ammo’s UNDERWOOD 40 SW 140GR – MAXIUM EXPANSION is a boxed handgun cartridge intended for range use and personal defense contexts. The cartridge is specified at 140 grains and features a copper solid bullet construction as listed by the manufacturer. Each retail box contains 20 rounds and a case is formed by ordering the number of boxes indicated by the manufacturer. The product name includes “MAXIUM EXPANSION” as provided in the source listing.
Key Specifications
- The manufacturer is Underwood Ammo.
- The caliber is .40 S&W.
- The bullet weight is 140 grains.
- The bullet type is listed as COPPER SOLID.
- The units per box are 20 rounds per box.
- The boxes per case are 10 boxes per case.
- The total rounds per case equal 200 rounds per case.
- The cartridge is marked as Reloadable: Yes.
- The UPC is 816874022662.
- Packaging is sold per box and a case is achieved by ordering the 10 boxes specified.
This listing provides a consistent 140-grain copper solid cartridge in retail 20-round boxes with an option to purchase in case quantity. The specification set and boxed packaging make this offering appropriate for shooters who prefer copper solid bullets and want a clear, straightforward bulk option.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




