a treatise on projectiles

P42/Sea Service rifled musket 1st pattern

Examples referenced have the ejector mark on the tip of the bullet and four broad arrows, but not a stamp in the centre of the cavity. None of the examples study retain the iron cup, hence the cup is shown dashed in the illustration, as its shape cannot be verified.

Official weight and dimensions (information from The British Soldier’s Firearm, 1850-1864, by C. H. Roads).

  • Weight: not given
  • Diameter: 0.746 in
  • Length: not given

P42/Sea Service pattern 1, fired

  • Weight: 807 gn (52.3 g)
  • Diameter: 0.777 in (19.7 mm)
  • Length: 1.012 in (25.7 mm)

This example has been fired in a four groove rifle, the rifling just visible on the exterior, but confirmed by the squared off interior of the cavity (the rounded corners of the square are directly aligned with the exterior rifling). The expansion medium was an iron plug, no longer present. Four broad arrows can be seen on the rim of the cavity.


P42/Sea Service pattern 1, fired

  • Weight: 797 gn (51.6 g)
  • Diameter: 0.758 in (19.2 mm)
  • Height: 0.996 in (25.3 mm)

Another fired P42/Sea Service bullet, although this time fired in a three groove rifle: note the rounded triangle in the cavity, the tips of the triangle aligned with the rifling grooves from the bore of the rifle. Iron cup expansion and possible traces of broad arrows on the cavity rim.


P42/Sea Service rifled musket introduction

P42/Sea Service rifled musket trial bullet

P42/Sea Service rifled musket 1st pattern

P42/Sea Service rifled musket 2nd pattern

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