.32 S&W is one of 607 cartridges supported by the IBC calculator. Pick a load from your reloading manual, enter it, and the calculator predicts velocity and peak pressure, then gives a verdict against the cartridge's pressure ceiling. It is a comparison tool for working between loads you already trust, not a source of load data.
| Max average pressure | 900 bar ≈ 13,050 psi |
|---|---|
| Case capacity (water) | 6.2 gr H₂O (0.40 cm³) |
| Case length | 15.4 mm (0.605″) |
| Max overall length | 23.6 mm (0.930″) |
| Bore diameter | 7.920 mm (0.312″) |
| Standard | CIP |
Catalogued reference values the calculator works from. No charge, velocity, or pressure data appears on this page; loads come from your manual.
IBC checks itself against a corpus of published loads from printed reloading manuals: the engine is run on each printed load and compared with the printed result. 2 of those loads are .32 S&W loads. On them, the model did this:
| Loads tested | 2 |
|---|---|
| Median velocity error | +4.4% (negative means the model reads slow) |
| Mean absolute velocity error | 7.2% |
| Within ±10% of printed velocity | 50.0% |
What these numbers are good for: judging how much confidence to put in a velocity comparison between two candidate loads for this cartridge. What they are not: a promise about any single load, and not load data. Charge weight, seating depth, powder lot, and your rifle all move the real result.
Open the calculator, pick .32 S&W from the cartridge list, and enter a load from your current reloading manual. Compare variants: bullet weights, powders, charge steps. Start 10% below the manual's maximum charge and work up, watch the verdict on every rung, and check real pressure signs at the bench. The free tier covers single-load predictions and the first steps of a work-up ladder; PRO unlocks the full ladder and the charts.
Open the calculatorAccuracy figures on this page were computed from the published-manual validation corpus (9796 loads across 155 cartridges) with engine v1.1.14 (corpus build da7ac091). Page generated 2026-11-11. Method and provenance: methodology & accuracy.