In the world of professional firearms training, certain principles stand the test of time because they are rooted in physical reality. Chief among them is a concept known simply as DVC.
For those who haven’t encountered it, DVC stands for the Latin phrase Diligentia, Vis, Celeritas. In English, this translates to Precision, Power, and Speed.
This concept was popularized by the late Colonel Jeff Cooper and has since become a cornerstone of modern shooting doctrine. While you may see the DVC logo on club patches or high-end pistols, it is far more than a brand. It is a foundational philosophy of survival that demands a perfect balance between three competing requirements.
The Triad of Combat: Precision, Power, and Speed
The philosophy behind DVC is one of equal weight. In a life-or-death encounter, a shooter cannot afford to prioritize one of these principles at the expense of the others.
1. Precision (Diligentia)
Precision is the ability to place a hit exactly where it needs to go. In competition, a shooter might spend an unrealistic amount of time ensuring a perfect “A-zone” hit. In combat, that hesitation is a liability. We must have enough precision to stop the threat, but not so much that we lose the initiative.
2. Speed (Celeritas)
Speed is the ability to react and engage faster than your attacker. However, pushing for raw speed often leads to inaccurate hits or total misses. We don’t need to be fast just for the sake of a timer; we need to be fast enough to get inside our attacker’s decision making process. Speed without precision is merely a waste of ammunition.
3. Power (Vis)
Power is the mechanical ability to stop a fight, the force required to incapacitate an adversary immediately. This is the element most often overlooked in modern training, yet it remains the most critical physical factor in stopping a dedicated threat.
What Happened to the “V” in DVC?
In modern competitive shooting, the “V” (Power) has been sidelined. Historically, organizations like USPSA and IDPA used Major and Minor scoring. Major calibers (like the .45 ACP) were awarded more points for marginal hits because a heavy bullet has a higher physical probability of being effective.
Today, many competitions normalize scoring to make the math easier for the range. While this works for sport, it nullifies the original DVC concept. It creates an environment where only Speed and Accuracy matter, ignoring the ballistic reality of the “thump.”
The Caliber Controversy: Physics vs. Popularity
“Is 9mm or .45 ACP better?” This argument is as old as the calibers themselves. I understand why the 9mm is popular, it offers higher magazine capacity and, in some cases, less recoil for faster follow-up shots. But at Urban Defense Academy, we prioritize stopping power based on three factors:
- Penetration: A 9mm lacks mass and can fail to reach vital organs through barriers or heavy clothing. The .45 ACP’s weight carries the momentum necessary to drive deep into vital regions.
- Wound Size: A 9mm creates a smaller wound cavity. Smaller wounds can “self-seal,” leading to a slow bleed-out. In a defensive situation, you don’t have minutes; you have seconds.
- The Psychological Response: We cannot control an attacker’s reaction. Because we cannot rely on a “psychological stop,” we must prioritize physical destruction via penetration and wound size.
The Hollow Point Myth
It is often argued that modern hollow points make the 9mm equal to a .45. While technology has improved, it is not a “magic pill.”
- Reliability: Hollow points rely on expansion. If the cavity is plugged by clothing or drywall, the bullet acts as a standard FMJ.
- Loss of Mass: To make a 9mm bullet expand, manufacturers often reduce its weight. A lighter bullet has less inertia, further degrading penetration.
- Functionality: Most firearms are designed for Full Metal Jacket (FMJ) ammunition. Hollow points may not feed reliably in every gun. Never carry a combination you haven’t thoroughly tested.
The Flat-Nose or Truncated Choice
When I met Jeff Cooper at Gunsite, I asked what he carried. His answer was the 230-grain truncated .45 ACP. A truncated bullet has a flat, squared-off top. This design ensures better penetration on hard, rounded surfaces (like car doors) where a round-nose bullet might skim off.
Following the advice of my instructor, Michael Harries, I prioritize a round that can punch through barriers and deliver maximum mass. For me, that is the Major caliber .45acp with a flat point. It is proven to hit harder, penetrate deeper, and function reliably.
Traditional Roots. Modern Readiness.
Some might call me a traditionalist. I’m okay with that. At Urban Defense Academy, we teach principles, not trends.
Popularity drives the market, but physics drives the fight. Whether you choose a 9mm or a .45acp, your training must be rooted in the DVC balance for effective armed self defense. If one of those three principles, Precision, Power, or Speed, suffers your chances of losing the fight increase.
Once you understand the balance of DVC, you can stop relying on trends and start relying on sound technique.
Ready to find your balance? If you are in the Liberty Hill or Greater Austin area, join us in the dry-fire classroom or on the range for real-world proficiency. Be ready.
