Velocity Impact of 4 Layers of Heavy Denim on 9mm

Testing the impact heavy denim can have on the velocity of a 9mm round? The test pistol is a Glock 17.

Glock 17 Gen 4 Specs:

  • Caliber: 9×19
  • Length: 202 mm / 7.95 in
  • Width: 30.00 mm / 1.18 in
  • Length Between Sights: 165 mm / 6.49 in
  • Height: 138 mm / 5.43 in
  • Barrel Height: 32 mm / 1.26 in
  • Barrel Length: 114 mm / 4.48 in
  • Weight Unloaded: 625 g / 22.05 oz
  • Weight Loaded: 905 g / 32.12 oz
  • Trigger Pull: ~2.5 kg / ~5.5 lbs
  • Trigger Travel: ~12.5 mm / 0.49 in
  • Barrel Rifling: right hand, hexagonal
  • Length of Twist: 250 mm / 9.84 in
  • Magazine Capacity:
    • Standard: 17
    • Optional: 19/33

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