Keywords: Girdled bullet and twin rifle groove.jpg en Girdled_bullet_and_twin_rifle_groove as used by the British Brunswick rifle The Artillerist's Manual By John Gibbon p 125 http //books google com/books id 8FEkwTZd9FMC pg PA119 dq Gibbon+rifles PPA125 M1 John Gibbon 1860 PD-Art Brunswick rifle Rifling |