Here is a detailed description of six inert pistol calibres: .44 Magnum, .45 Long Colt, .357 Magnum, .45 ACP, 9mm, and .38 Special.

1. .44 Magnum

• Dimensions:
  • Bullet Diameter: 10.9 mm (0.429 inches)
  • Case Length: 32.6 mm (1.285 inches)
  • Overall Length: 41.5 mm (1.61 inches)
• Appearance:
  • Case: Brass with a rimmed design.
  • Bullet: Often a lead or jacketed hollow point.
  • Headstamp: Typically marked with ".44 MAG".
• Usage:
  • Firearms: Revolvers and carbines.
  • Purpose: Hunting, self-defense, and target shooting.
• Inert Version: Devoid of primer and propellant, with a drilled-out case to signify deactivation.

2. .45 Long Colt

• Dimensions:
  • Bullet Diameter: 11.5 mm (0.452 inches)
  • Case Length: 32.6 mm (1.285 inches)
  • Overall Length: 40.6 mm (1.6 inches)
• Appearance:
  • Case: Brass with a rimmed design.
  • Bullet: Typically lead, sometimes jacketed.
  • Headstamp: Often marked with ".45 COLT".
• Usage:
  • Firearms: Revolvers and some lever-action rifles.
  • Purpose: Cowboy action shooting, hunting, and self-defense.
• Inert Version: No primer or powder, often with a drilled case.

3. .357 Magnum

• Dimensions:
  • Bullet Diameter: 9.1 mm (0.357 inches)
  • Case Length: 33 mm (1.29 inches)
  • Overall Length: 40 mm (1.59 inches)
• Appearance:
  • Case: Brass, rimmed.
  • Bullet: Typically jacketed hollow point or soft point.
  • Headstamp: Marked with ".357 MAG".
• Usage:
  • Firearms: Revolvers and some rifles.
  • Purpose: Self-defense, law enforcement, and target shooting.
• Inert Version: Inactive primer and no propellant, with case modifications to denote inactivity.

4. .45 ACP (Automatic Colt Pistol)

• Dimensions:
  • Bullet Diameter: 11.5 mm (0.452 inches)
  • Case Length: 22.8 mm (0.898 inches)
  • Overall Length: 32 mm (1.275 inches)
• Appearance:
  • Case: Brass, rimless with a slight taper.
  • Bullet: Full metal jacket or hollow point.
  • Headstamp: Typically marked with ".45 ACP".
• Usage:
  • Firearms: Semi-automatic pistols and some carbines.
  • Purpose: Military, law enforcement, self-defense, and sport shooting.
• Inert Version: Deactivated primer and no powder, sometimes with drilled or marked cases.

5. 9mm (Parabellum, Luger)

• Dimensions:
  • Bullet Diameter: 9 mm (0.355 inches)
  • Case Length: 19 mm (0.754 inches)
  • Overall Length: 29.69 mm (1.169 inches)
• Appearance:
  • Case: Brass, rimless and slightly tapered.
  • Bullet: Full metal jacket or hollow point.
  • Headstamp: Often marked with "9mm" or "9x19".
• Usage:
  • Firearms: Semi-automatic pistols and submachine guns.
  • Purpose: Military, law enforcement, self-defense, and competition shooting.
• Inert Version: Inactive primer and no propellant, case may be drilled or marked for identification.

6. .38 Smith & Wesson

• Dimensions:
  • Bullet Diameter: 9.1 mm (0.357 inches)
  • Case Length: 29.3 mm (1.155 inches)
  • Overall Length: 39 mm (1.55 inches)
• Appearance:
  • Case: Brass, rimmed.
  • Bullet: Typically lead or jacketed.
  • Headstamp: Marked with ".38 SPL" or similar.
• Usage:
  • Firearms: Revolvers, some carbines, and rifles.
  • Purpose: Target shooting, self-defense, and law enforcement.
• Inert Version: No primer or powder, often with case modifications to indicate deactivation.

General Characteristics of Inert Rounds:

• No Primer or Propellant: Safe for handling and display.
• Markings: Often clearly marked or altered (e.g., drilled cases) to indicate they are inert.
• Uses: Training, educational displays, and collecting.

These inert rounds provide a safe way to study and display these common calibres without the risk associated with live ammunition.