The narrator tests the penetration of various firearms through a pine tree, with a Clear Ballistics gel torso ("Bill") placed behind the tree to visualize the damage. The narrator starts with smaller calibers (22, 9mm, 45, 357) and progressively increases to larger calibers (12 gauge, 223, 762x39, 308, 300 Win Mag, 338 Lapua), but none penetrate the tree. The narrator concludes that the tree is "bulletproof" to these calibers. However, when using a 50-caliber rifle, the narrator is finally able to penetrate the tree, with the steel core of the bullet passing through and striking the gel torso.
Here are the key facts extracted from the text:
1. The experiment involved shooting at a tree with various firearms to see what it takes to penetrate the tree.
2. The tree used in the experiment was a pine tree.
3. The firearms used in the experiment included a .22, .45, 9mm, .357, 12-gauge shotgun, 5.56x45mm, 7.62x39mm, .308, .300 Winchester Magnum, .338 Lapua Magnum, and .50 caliber.
4. The experiment was not a scientific test, as there were different tree sizes and densities.
5. The tree was located in front of a berm and had been previously shot at with a 12-gauge shotgun.
6. A clear ballistics torso was used to see what would happen to a bullet after penetrating the tree.
7. The experiment was conducted in a national forest area.
8. The .22, .45, 9mm, .357, 12-gauge shotgun, 5.56x45mm, 7.62x39mm, .308, .300 Winchester Magnum, and .338 Lapua Magnum did not penetrate the tree.
9. The .50 caliber was the only firearm that was able to penetrate the tree.
10. The .50 caliber bullet that penetrated the tree was a steel-core bullet.
11. The copper jacket of the .50 caliber bullet was shed completely, leaving only the steel core.
12. The experiment suggests that a tree can stop most modern rifle rounds, but a .50 caliber with a steel core can penetrate the tree.