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About AFTE
Menu Toggle
What is AFTE?
Board of Directors
Menu Toggle
Board of Director’s Duties
Committees
Administrative
Menu Toggle
Bylaws
Code of Ethics
Policy Letters
Conflict of Interest Policy
AFTE Position Documents
Past Presidents & Awards Recipients
Membership
Menu Toggle
Become a Member
International
Assistance
AFTE Journal
Menu Toggle
What is AFTE Journal?
Peer Review Process
Want to Publish?
Find an Article
Subscriptions
Certification
Menu Toggle
Certification Policies & Procedures
Recertification Policies & Procedures
Testing Information
Menu Toggle
Study Guide
Testing Dates
Test Portal
Certified Member Roster
Resources
Menu Toggle
Glossary
Electronic Resources
Menu Toggle
Admissibility Resource Kit (ARK)
Headstamp Gallery
Training Seminar Presentation Index
OSAC
Menu Toggle
OSAC Website
OSAC Firearms Process Map
Expert Referral
Training Manual
Forum
Training Seminar
Menu Toggle
AFTE 2026
Prospective Host Info
Annual Training Seminars
Scholarship Program
Research & Development
AFTE Store
Menu Toggle
New Member Fees
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Menu Toggle
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Toolmark Certification
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AFTE Store - Some Notes on Determination of Twist
A method for determining rifling twist is reported.
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25.00
Some Notes on Determination of Twist quantity
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