1. Firearms and Ballistics

2. Revolver

3. Semi-Auto Pistol

4. How a gun works

6. Ammunition

7. Ammunition

8. PREMIUM LOAD with SHOTCUP Pellets do not contact bore

11. Some problems

12. Stable vs. Instable Projectile Flight

13. Rifling

20. The match on the bullet

23. Gunshot Residue

30. GSR Particle on the SEM

33. Lead Poisoning

34. Bullet Trajectory

37. Penetration and perforation The Bullets effect on sheet metal at increasing angles

38. Critical Angle and Deflection

39. Critical Angle and Deflection

43. Trajectory reconstruction using lasers

44. Laser trajectory at night

45. Shotgun Pellet Patterns In General…. For every 1” across = 1 Yard from Muzzle 7” Muzzle to Target = 7 Yards

46. Pellet Pattern Diameter vs. Range Orthogonal Impacts d d d

47. Non-Orthogonal Pellet Patterns sin -1 (d/D) = incidence angle

48. Orthogonal Strikes No. 4 Buck 12-ga. d = 7 in.

49. 45 0 Incident Angle with No. 4 Buck, 12 ga. d = 7 in. d/D = 0.67 Sin -1 = 42 0 Same Range as previous shot

50. LEFT vs RIGHT

51. RIFLING TWIST DETERMINATION from RICOCHET MARKS on SMOOTH, HARD SURFACES The “ Chisum” Trail

52. 230-gr. .45 Auto FMJ-RN Incident Angle = 10 0 Surface = Smooth Steel Ricochet Angle = 1.4 0 13 0 profile views

53. Three 50-gr. FMJ .25 Automatic Bullets Ricocheted from a Hard, Unyielding Surface after Low (less that 5 0 ) Incident Angle Impacts

55. Ejection Patterns X

56. Bullets and Glass

57. BB Impact

65. Laminated Auto Glass

66. What else can be matched?

68. Extractor and Breech