Ammunition Components & Ballistics Manufacturing worked example

Case Forming Yield Calculator at 70% target case-forming yield: a worked example

This worked example runs the case forming yield calculator numbers for a tougher week than the baseline: 70% target case-forming yield instead of the typical 97%. Calculate accepted brass case forming yield from good case count, total cases started, and the target yield for a manufacturing lot.

The inputs for this scenario

  • Accepted formed case count: 96,500 cases (held at the documented default)
  • Total cases started: 100,000 cases (held at the documented default)
  • Target case-forming yield: 70 % (the input this scenario stresses; the baseline uses 97)

Working through the calculation

  • The calculation starts from the formula this tool documents: Actual case-forming yield = accepted formed case count ÷ total cases started × 100.
  • Actual case-forming yield works out to 96.5 % yield at these inputs, and this is the headline figure for the scenario.
  • Yield gap to target works out to -26.5 points at these inputs.
  • Accepted formed case count works out to 96,500 cases at these inputs.
  • Total cases started works out to 100,000 cases at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target case-forming yield sits at 97% and the headline result is 96.5 % yield, this scenario lands almost exactly on the baseline at 96.5 % yield.
  • Use it after a forming run or shift to verify yield against target and to trend tooling and anneal performance. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Actual case-forming yield: 96.5 % yield (headline result)
  • Yield gap to target: -26.5 points
  • Accepted formed case count: 96,500 cases
  • Total cases started: 100,000 cases

Run it with your numbers

  • To rerun this with your own numbers, open the live Case Forming Yield Calculator calculator, set target case-forming yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.