Showing the details of the shells used(where known)   Tweet Weapon Details 107mm Gun M10/30 (Field Gun) Manufactured 1931 - 1935 Calibre 107mm Length L/38 Rate of Fire 6 rpm B-420 (APCBC Armor Piercing Capped Ballistic Cap) 107mm 16.7Kg 655M/Sec Quoted Penetration 90mm @ 500mtr/30° ( ? 103mm/0?) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.15 0.31 0.63 1.3 2.02 2.78 3.57 4.41 Penetration(mm@30°) 93 90 86 78 71 64 58 53 Penetration(mm@0°) 108 105 100 91 82 75 68 61 Hit Probability(%) 98 98 95 88 55 37 15 8 F-420U (HE High Explosive) 107mm 17.2Kg 670M/Sec 2.150Kg explosive Maximum Range 16160 Mtr Range(Mtr) 1000 2000 3000 4000 5000 6000 8000 10000 Flight Time(Secs) 1.6 3.4 5.41 7.6 9.98 12.51 18.01 23.95 lateral dispersion means the side to side variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.27 0.53 0.80 1.07 1.33 1.60 2.13 2.67 80% of shells land within +/- (mtr) 0.35 0.68 1.02 1.37 1.70 2.05 2.73 3.42 95% of shells land within +/- (mtr) 0.53 1.04 1.57 2.10 2.61 3.14 4.17 5.23 range dispersion means the back to front variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.33 0.67 1.00 1.33 1.67 2.00 2.67 3.33 80% of shells land within +/- (mtr) 0.42 0.86 1.28 1.70 2.14 2.56 3.42 4.26 95% of shells land within +/- (mtr) 0.65 1.31 1.96 2.61 3.27 3.92 5.23 6.53 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.15 0.3 0.62 1.28 1.99 2.74 3.54 4.37 Hit Probability(%) 98 98 95 88 68 37 15 8 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 4 mtr Burst radius Infantry in open 66% kill 8 mtr Burst radius Infantry in open 33% kill 21 mtr  Armour Penetration inc roof at 1 mtr 6 mm An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 8 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 21 mtr of infantry in the open will cause 33% casualties. The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 6 mm of the tank armour including the roof.

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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