.297/230 Morris sh 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 | 1,700 bar ≈ 24,650 psi |
|---|---|
| Case capacity (water) | 4.6 gr H₂O (0.30 cm³) |
| Case length | 15.0 mm (0.590″) |
| Max overall length | 22.6 mm (0.890″) |
| Bore diameter | 5.690 mm (0.224″) |
| Standard | CIP |
Catalogued reference values the calculator works from. No charge, velocity, or pressure data appears on this page; loads come from your manual.
.297/230 Morris sh is fully supported in the calculator, but the current published validation corpus has no .297/230 Morris sh loads in it yet, so IBC prints no per-cartridge accuracy figure here. Per-cartridge numbers on this site appear only where the corpus actually contains loads for that cartridge. The corpus-wide results and the method behind them are on the methodology page.
Open the calculator, pick .297/230 Morris sh 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.