French Manufactured 20 mm + Cannon Ammunition By: Emeric Daniau Quelques données sur les calibres 20mm, 25mm, 30 et 40mm fabriqueé par Manhurin en France. All weights are in grams, dimensions are in millimeters and muzzle velocity is in meter per second. The HE filler used is Hexal (mixture of RDX and aluminium powder) for High Explosive and incendiary effect. Name Cart.Wgt P.Wgt HE.Wgt Vel Gun 20x82 HEI 210 112 9 - 9,6 720 m/s MG151 et similaire 20x102 HEI 255 102 9 980 m/s CN-MIT 621 et similaire 20x102 M50 HEI 260 102 11 1050 m/s M39, M61, M193, M197 20X110 HEI 250 123 11,5 850 m/s HS804, MkII, MkV, HS404 20X110 RB HEI 245 122 8 - 11,4 845 m/s MkII, MkIII, MkIV 20X110 USN HEI 274 110 7 1012 m/s MkXI, MkXII 20X128 HEI 340 125 7,5 - 12 1050-1100 m/s KAA (204GK), KAB (5TG) 20X139 HEI 315 120 9,5 - 11 1050 m/s HS820, RH202, CN-MIT F1 25X137 HEI 498 183 27 1100 m/s M242, GAU12, KBA 25X137 APFSDS 498 140 0 1350 m/s M242, GAU12, KBA 30X113 B HEI 452 245 22 765 m/s ADEN 30X113 B HEI 442 245 48 810 m/s DEFA, Type 550 30X170 HEI 890 360 38 1070-1080 m/s HS831L, Rarden 30X173 HEI 840 363 ? 1070-1100 m/s GAU8, Bushmaster 30X173 APFSDS 840 230 0 1400 m/s GAU8, Bushmaster 35X228 HEI 1600 550 106 1175 m/s KDB/C/E/F 40X311 R HEI 2130 913 104 880 m/s 40L60 40X365 R HEI 2500 960 128,5 1005 m/s 40L70 and for small arms (Proj.wgt in grains x muzzle velocity in fps): .475 Mag 430grs x 1300fps, 384grs x 1625fps .500 Mag 440grs x 1200fps 8 bore 1250grs x 1500fps 4 bore 1880grs x 1330fps Emeric.