- 01: Introduction
- 02: History
- 03: Propellants, Firearms, and Ammunition Development
- 04: Modern Firearms Manufacture
- 05: Small Arms Ammunition
- 06: Evidence Handling Procedures
- 07: Equipment and Instrumentation
- 08: Examination of Firearms
- 09: Cartridge and Shotshell Examination
- 10: Characterization and Evaluation of Fired Projectiles
- 11: Bullet Comparison and Identification
- 12: Gunshot Residue and Distance Determination
- 13: Toolmark Identification
- 14: Communicating Results
- Resources
Scales
Home > Examination of Firearms > Examination > Trigger Pull > Scales
Trigger pull spring scale
Trigger pull digital scale
The steps in measuring trigger pull with a spring scale are the following:
- Cock the firearm.
- Attach one end of the scale to a fixed object and position the other end against the trigger.
- Slowly pull away from the fixed object until the firearm discharges.
- Record the pounds of pressure required to discharge the firearm as indicated on the scale.
Digital trigger pull scales operate in a similar way to spring scales. Calibrate and use digital scales as specified by manufacturer’s instructions.
