9/21/2025
If you've spent any time in the world of firearms, you've likely heard the debate: is the 9mm powerful enough for self-defense? For decades, this cartridge has carried an unfair stigma of being "underpowered." But where did this idea come from, and does it hold any weight with today's technology? The truth is, the 9mm's bad reputation is a relic of the past, thoroughly debunked by modern ammunition science.
The roots of this controversy stem from a single tragic event: the 1986 FBI Miami shootout. During that firefight, agents using 9mm rounds struggled to neutralize two determined attackers. The aftermath led the FBI to famously abandon the 9mm in search of a more powerful cartridge, first adopting the 10mm Auto and then the .40 S&W. This very public shift sent a clear message to the public and law enforcement worldwide: the 9mm was insufficient. The term "9mm" became synonymous with failure for an entire generation of shooters.
However, to judge the modern 9mm by 1986 standards is a critical error. The ammunition used then pales in comparison to what we have today. Advancements in Jacketed Hollow Point (JHP) design have been nothing short of revolutionary. Contemporary 9mm JHP rounds are engineered for consistent expansion, optimal penetration depth (as per FBI standards), and extreme reliability. The modern defensive 9mm round is a highly effective fight-stopper.
Furthermore, the shooting community has largely moved past the mythical concept of "stopping power." While caliber matters, empirical evidence and ballistic gel testing consistently prove that shot placement is the single most important factor. A well-placed shot with a 9mm is far more effective than a poorly placed shot with a .45. The 9mm excels in this regard because its low recoil allows shooters to place accurate shots faster and manage follow-up shots more effectively. This, combined with higher magazine capacity, makes the 9mm a superior platform for most users.
This is precisely why the FBI itself—the organization that started the trend away from 9mm—completed a full-circle return to the caliber in 2015. They recognized that modern 9mm ammunition meets all their performance criteria while offering better shootability and capacity than larger calibers.