Four published rounds, plus the models underneath.

Infinite-cylinder fragment V0 — Krauthammer, Modern Protective Structures, gives 1030 m/s for the M107 initial fragment velocity. ARL's FragProp benchmark work reports a peak fragment impact velocity of 3380 ft/s at 8 ft from an M107 detonation, which is the same number from an independent model and test series.

Mott N₀ vs arena fragment count — Åkesson / Dullum arena recovery: 2538 fragments. The workbench column is Mott–Linfoot N₀ from the AMCP / Cooper scale (M_A = B t^{5/6} d_i^{1/3}(1+t/d_i), μ = M_A²) on the ogive wall fitted to published casing metal, with the mild-steel TNT constant B = 0.0779. Not a recovered count pasted in.

Mott mean fragment mass — Åkesson / Dullum arena recovery: 36.4 kg of casing came back as 2538 fragments (mean 14.34 g). The workbench column is Mott mean mass 2μ from the same AMCP scale and fitted ogive wall. Model versus firing, not metal divided by a pasted N.

Incident overpressure at 15 m (free air) — Kingery–Bulmash free-air incident overpressure (Jeon, Kim & Han 2017 fit to ARBRL-TR-02555) at 15 m on the published 6.623 kg TNT. The workbench column is Kinney–Graham at the same W and R — two airblast models, not a firing.

Range to 5 psi incident (eardrum) — Distance at which incident overpressure falls to 5 psi, the Soft Effects eardrum threshold. Published column is Kingery–Bulmash inverted at the published TNT mass; workbench is Kinney–Graham inverted at the same W.

Range to 0.9 psi incident (glass) — Same inversion at 0.9 psi, the open glass-breakage threshold. Blast area of effect on the fill, not a fragment radius.

Initial fragment velocity — Elshenawy, Aboel Seoud and Abdo (Defence Science Journal) fired a 120 mm mortar body statically against a layered witness stack and matched it with Split-X and Autodyn-3D. The largest kinetic-energy fragment came off at 6.2 g and 1100 m/s.

6.2 g fragment speed at 20 m — The same paper publishes a velocity–distance history for that fragment. The workbench flies an identical 6.2 g fragment from an identical 1100 m/s as a scored chunk (the compact Split-X fragment, not a Mott bacon strip), so nothing but the compact-fragment drag law is under test.

6.2 g fragment speed at 40 m — Same history at 40 m. A tumbling natural fragment (Cd 1.15, bacon-strip area) bleeds speed faster than this compact fragment; the probe uses the scored-chunk drag that matches Split-X.

Incident overpressure at 10 m (free air) — Kingery–Bulmash free-air incident overpressure at 10 m on the published 2.25 kg TNT. Workbench is Kinney–Graham at the same W and R.

Range to 5 psi incident (eardrum) — Distance at which incident overpressure falls to 5 psi. Kingery–Bulmash vs Kinney–Graham, same TNT mass.

Range to 0.9 psi incident (glass) — Same inversion at 0.9 psi. Blast area of effect on the mortar fill, not a fragment radius.

Mild steel perforated at 7 m — The Swedish MSB / Fortifikationsverket witness-plate trial detonated four Mk 82 bombs (218 kg, 87 kg Tritonal) inside a half circle of 1200 × 1200 mm witness plates at 7 m. The 25 mm plates took 210 recorded hits and 118 perforations; the 51 mm plates took 183 hits and 3. That bracket is the arriving-hit population. The workbench column is THOR for the Mott mean fragment (~9 g), the numerous small-fragment class, which sits at or below the 25 mm plate. It is not a pasted inventory of 4000 equal fragments.

Sector holding ~90% of fragments — In the same trial the bomb was laid horizontally for one shot and 90% of hits fell in a 30° sector — 10° forward and 20° aft of the case normal. The workbench spray half-angle of 12° gives a 24° full sector, tighter than measured because it is symmetric about the Taylor-shifted normal rather than skewed aft.

Incident overpressure at 30 m (free air) — Kingery–Bulmash free-air incident overpressure at 30 m on the published Tritonal fill × 1.07 TNT factor (93.2 kg TNT-eq). Workbench is Kinney–Graham at the same W and R.

Range to 5 psi incident (eardrum) — Distance at which incident overpressure falls to 5 psi. Kingery–Bulmash vs Kinney–Graham on the Mk 82 TNT-equivalent mass. Blast area of effect; fragments still dominate at this caliber.

Range to 0.9 psi incident (glass) — Same inversion at 0.9 psi, the open glass-breakage threshold.

Spherical Gurney V0 — Open literature does not publish an M67 arena V0. This row is the closed-sphere Gurney identity (BRL-405) on the published C and M — a physics check, not a measured firing.

Incident overpressure at 5 m (free air) — Kingery–Bulmash free-air incident overpressure at the FM 23-30 killing radius (5 m) on 184.3 g Comp B × 1.2 TNT factor. Workbench is Kinney–Graham. Blast is not the kill mechanism at this fill; the row checks the airblast path on a small W.

Range to 5 psi incident (eardrum) — Kinney–Graham vs Kingery–Bulmash distance to 5 psi incident on the M67 TNT-equivalent mass. Much smaller than the fragment casualty radius, which is the point.

RED 10% PI vs FM 23-30 casualty radius — FM 23-30: effective casualty-producing radius 15 m from fragments. The workbench column is RED 10% PI from fragments that are still ≥79 J when they pass range R, over the isotropic 4πR² spray (Åkesson, 0.50 m² standing soldier). Same idea, not the same definition.

Max fragment ground range vs published reach — FM 23-30 warning: fragments can disperse as far as 230 m. The workbench column is the furthest ground impact from the same fly-out (any KE). That is the doctrinal “can travel” figure, not a miss on Mott — the example is 1000 preformed spheres. Workbench MSD remains the furthest 79 J strike — a shorter, hazardous-fragment distance, not this row.

Free-air Ps at Z = 1 m/kg⅓ — Jeon, Kim & Han, Computation 2017 — modified Kingery–Bulmash free-air incident overpressure vs Kinney–Graham at scaled distance 1. Model-vs-model, not a firing.

Free-air Ps at Z = 2 m/kg⅓ — Same comparison at Z = 2, mid-field where both fits are well constrained.

Free-air Ps at Z = 5 m/kg⅓ — Same comparison at Z = 5. Kinney and Kingery–Bulmash typically sit within about ten percent here.

Surface-burst Ps at Z = 1 m/kg⅓ — Swisdak 1994 hemispherical surface-burst polynomials at Z = 1 vs Kinney with the 1.8 W hemispherical factor. Tests the ground-burst switch, not the free-air fit.

Forrestal 1994 grout shot 6-2374 — Forrestal, Altman, Cargile and Hanchak, Int. J. Impact Eng. (1994): 12.7 mm CRH 3 ogive, 64.2 g, 371 m/s into 13.5 MPa grout, measured depth 127 mm. The Projectile tab uses this equation.

Shaped-charge jet at optimum standoff — Birkhoff continuous-jet idealisation: κ = 6 CD copper into steel at Z/D = Z_opt. Open liner literature puts useful jet depth in roughly 4–8 charge diameters at optimum standoff. First-order estimate, not a hydrocode.

EFP slug density-ratio form — Open EFP slug depth P/D = (L/D)·√(ρ_liner/ρ_target) for an 0.8 CD copper slug into steel. Published well-formed EFPs typically sit between about 0.5 and 1.2 CD in RHA-class steel.