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Announcements
- 2-Day Training Event April 13 and 14
- Intro to Defensive AR May 11
- Advanced Beyond Concealed Carry
- June 1-2 in Dallas
- June 8-9 in San Antonio
- ShootersClubMembers.com
3 Types
Internal; Time the trigger is pulled until the bullet exits the barrel
- Lock Time
- Dwell Time
- Barrel Harmonics
- Forcing Cone or Throat
- Bullet Jump
- Twist Rate
- Pressure Curves
- Powder Burn Rates
- Lock Time
**** I mentioned the chamber pressure for an M4 a couple times as 25,000 PSI and the SAAMI spec is actually 52,000 PSI. Thanks to the listener for pointing that out. I should have looked it up instead of going off of my faulty memory. ****
External; The acre the bullet takes in flight
- Bullets Fall at 9.8m/s2
- Sights or Line of Sight is designed to intersect the bullets path
- Bullet appear to fall faster as it moves slower
- Ballistic Coefficient
Terminal; What the bullet does when it hits something
- Normally what people are concerned with
- FBI Test (see an outline here)
- Penetrate 12-18 Inches
- Ballistic Gel Blocks 6×16”
- 6 Events 5 rounds each (total 40)
- Bare
- Heavy Clothing
- Steel
- Wallboard
- Plywood
- Auto Glass
- Heavy Clothing at 20 Yards
- Auto Glass at 20 yards
- 2 Different guns, “1 service weapon and 1 test barrel”
- 2 10-shot Groups fired from each for measurement
- Target Shooting Doesn’t matter much
- Self Defense Most trauma possible to create as fast a stop as possible
- Bullet weight retention is always mentioned
- Permanente Wound Channel
- Temporary Stretch Cavity
- The Strasbourg Tests
- Conclusion “…Because of the high probability of rib impact, a single handgun bullet cannot be counted on to immediately incapacitate an individual. Multiple rounds should be fired.”
- 3 Times is the magic number
Stay Safe,
Ben