Source-aware assessment of charge-location transfer in fast-running internal-blast correlations for a vented steel magazine

Previous experiments on a vented steel magazine reported separate internal peak-pressure correlations for a charge at the portal and one opening width inside. This secondary reanalysis examines whether either correlation transfers to the other charge location and whether source-relative geometry clarifies the historical pressure field. The archived tables contain 116 gauge records without shot identifiers; means and standard deviations are therefore descriptive, not estimates based on independent detonations. The two approximately 10.8 MPa local peaks occurred at nearly equal source-to-sensor distances (R s /D = 0.504 and 0.500), although their portal coordinates differ. Cross-application of the portal-coordinate correlations over x/D = 1–3 produced mean absolute percentage errors of 53.3% and 280.0%. Source-relative distance clarifies local proximity but does not remove boundary effects. These results support restricting correlation use to the represented configuration and requiring representative validation against observed responses before transfer. They do not establish a generalized correlation or a universal acceptance threshold.