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- | | | | | Joergensen| +-------------------+---------------+--------------------+---------------+ |Calibre of rifle | .303 in. | .276 in. | .254 in. | |Number of grooves | 5 | 4 | 4 | |One twist in |10 in. to left |8-11/16 in. to right| 8 in. to left | |Muzzle velocity | 2,000 f.s. | 2,262 f.s. | 2,309 f.s. | |Sighted to | 2,800 yds. | 2,187 yds. | 2,406 yds. | |Weight of cartridge| 416-1/2 grains| 384.5 grains | 372.1 grains | |Weight of bullet | 215 grains | 173.3 grains | 156.4 grains | |Length of bullet | 1.250 in. | 1 in. | 1.250 in. | |Calibre of bullet | .309 in. | .280 in. | .260 in. | |Charge of powder | 31-1/2 grains | 38.0 grains | 36 grains | | | (cordite) | (smokeless) |(nitro | | | | | -smokeless) | |Nature of alloy | Cupro-nickel | Mantle: Steel |Mantle: Mild | | used for mantle | | with alloy of | steel coated | | of bullet | | copper on | with copper | | | | surface | nickel, the | | | | | composition of| | | | | the latter | | | | | being that of | | | | | the cupro- | | | | | nickel of the | | | | | Lee-Enfield | | | | | bullet | |Thickness of |Mark II. bullet| -- | -- | | mantle | | | | |Tip | .036 | .031 | .022 | |Sides .984 from tip| .015 | .015 | .015 | +-------------------+---------------+--------------------+---------------+ Some particulars of the four rifles and their projectiles are collated in Table I., to which is added the corresponding information regarding the Martini-Henry for the purposes of comparison. TABLE II.
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