10mm vs 357 Magnum vs Ballistic Gel
This ballistic gel test compares 10mm and .357 Magnum calibers using Underwood Ammo. The .357 Magnum 158gr achieved deep penetration (25.5"), while the 125gr fragmented early (17"). The 10mm 200gr offered consistent performance (22.5"), and the 150gr fragmented similarly to the .357 Mag 125gr (17.5"). Bullet recovery showed varying weight retention and expansion across all tested loads.









