Do books in book bags help slow down 9mm bullets?

This video tests the ballistic resistance of a 1kg rubber mallet against various calibers of ammunition, from .22 LR to .308 Winchester. The mallet demonstrates significant resistance, absorbing or deflecting most rounds, but is ultimately penetrated by the .308. The test highlights the surprising durability of the rubber mallet against firearm projectiles.

This video explores the terminal ballistics of 9mm ammunition impacting a frozen lake. The experiment demonstrates that while 9mm rounds can penetrate ice, they do not typically bounce back spinning as some might expect. The test also shows that even with shallow ice, 9mm bullets can be recovered, and a 'mag dump' can effectively create an ice fishing hole.

This video tests the projectile stopping power of soda bottles against a 9mm handgun. Multiple 2-liter bottles were stacked and shot to determine how many were required to stop a 9mm projectile. The experiment found that five bottles were penetrated, with the sixth bottle cracking and deflecting the bullet without full penetration.

This video demonstrates a practical, albeit unconventional, test of bullet penetration using decks of cards against various firearm calibers, from 9mm to .50 BMG. The host, a firearms enthusiast, showcases the relative stopping power of different rounds, highlighting the significant energy required to impede even smaller projectiles. The experiment emphasizes firearm safety and provides a visual understanding of ballistic performance.

This video analyzes the cost-effectiveness of reloading ammunition in 2026, focusing on common calibers like 9mm, .223/5.56, and larger calibers such as .300 Win Mag. It details the costs of components (primers, powder, brass, bullets) and compares them to factory ammunition prices. The analysis highlights that reloading is only cost-effective for those shooting a significant volume of rounds annually (at least 1,000 per year) and who can reuse brass multiple times, with a break-even point typically occurring after 3 years for common calibers and 2 years for larger calibers, assuming initial equipment costs are already covered.

This video demonstrates the performance of a commercially available 9mm ammunition with a blue tip, referred to as 'energetic ammunition' due to YouTube's content policies. The presenter tests its impact on the ground and a tree stump using an Arms Di9Z 9mm pistol, noting its destructive potential and tendency to fragment rather than penetrate deeply.

This video provides expert guidance from Instructor Mike on how an Illinois concealed carrier should comply with police during a traffic stop. It details maintaining officer safety, proper disclosure of a concealed firearm, and presenting identification and permits from a lanyard to avoid sudden movements. The instructor emphasizes proactive communication and adherence to safety protocols taught in his courses.

Instructor Mike, identified as a Firearms Instructor, provides expert guidance on secure firearm storage within a vehicle. He strongly advocates for carrying the firearm on your person as the most secure method, with shoulder holsters presented as a viable alternative. The video explicitly discourages several common but unsafe storage locations, including between seats, sun visors, door pockets, near the steering column, center consoles, and glove boxes, highlighting the risks associated with each.

This video from Instructor Mike critiques an off-duty officer's poor tactical choices while working a side job. Key takeaways include the dangers of wearing a hoodie that obstructs peripheral vision and the risks associated with using earbuds that diminish auditory awareness. Instructor Mike emphasizes the importance of maintaining situational awareness even when off-duty or in a secondary role.

This video demonstrates a traffic stop scenario involving Instructor Mike and a Chicago police officer. It highlights the importance of maintaining visible hands during an interaction and provides a practical example of how to communicate effectively with law enforcement. The officer issues a warning for a missing license plate, emphasizing the need for proper vehicle documentation.