A typical pellet gun produces between 10 and 35 foot-pounds of muzzle energy, depending on the caliber and powerplant. That’s roughly 1% to 3% the energy of a common handgun round, but it’s more than enough to penetrate skin, kill small game, and cause serious injury. The power range is wide because “pellet gun” covers everything from a youth-oriented springer to a pre-charged pneumatic rifle built for hunting.
Power by Caliber
Pellet gun power is measured in foot-pounds of energy (fpe), which accounts for both how fast and how heavy the projectile is. Caliber is the single biggest factor in how much energy a pellet carries. Here’s what real-world numbers look like across the most common sizes:
- .177 caliber: An 8-grain pellet at 1,200 feet per second produces about 25.6 fpe. This is the most common caliber for target shooting and plinking.
- .22 caliber: A 14.3-grain pellet at 900 feet per second produces about 25.7 fpe. The heavier pellet carries similar energy at a much lower speed, and it holds onto that energy better at distance.
- .25 caliber: A 25-grain pellet at 800 feet per second produces about 35.5 fpe. This is where pellet guns start to become serious small-game tools.
- .30 caliber: An 81-grain pellet at 900 feet per second produces roughly 162 fpe. These high-end pre-charged pneumatic rifles overlap with some firearm cartridges and are legal for deer-sized game in certain states.
The pattern is clear: heavier pellets at moderate speeds generate as much or more energy than light pellets screaming out of the barrel. A .22 pellet moving at 900 fps matches a .177 pellet at 1,200 fps, and the heavier pellet is more effective on impact because it resists air drag and holds its momentum further downrange.
How Pellet Weight Affects Downrange Power
Muzzle energy tells you what a pellet starts with, but pellets shed energy quickly compared to conventional bullets. A .22 caliber pellet starting at 33 fpe loses about 9 fpe by 50 yards and drops to just 15 fpe at 100 yards, less than half its starting energy. That’s a steep falloff, and it’s the main reason pellet guns are considered short-range tools.
Lighter pellets lose energy even faster. They’re more affected by wind drift and slow down quickly because they don’t have the mass to push through air resistance. Heavier pellets in the same caliber fly slower initially but arrive at 50 yards with more energy intact, hit harder, and group more consistently. If you’re choosing pellets for anything beyond backyard plinking, heavier options almost always outperform light ones in practical terms.
Skin Penetration and Injury Potential
Pellet guns are often treated casually, but the energy thresholds for causing real harm are surprisingly low. Research published in forensic science literature found that a .177 caliber pellet weighing 8.25 grains needed only 331 feet per second to penetrate human skin. A .22 caliber pellet at 16.5 grains perforated skin at just 245 feet per second. Most pellet guns on the market produce velocities two to four times those minimums.
Heavier, larger projectiles need less velocity to penetrate because their energy is concentrated over a smaller relative area of presentation. This is why a .22 pellet breaks skin at a lower speed than a .177. It also means that mid-range and high-powered air rifles firing at 800 to 1,000 fps are capable of penetrating well beyond the skin into muscle, bone, and organs at close range. Eye injuries are the most common serious harm from pellet guns, and they can cause permanent blindness even from low-powered guns.
Enough Power for Hunting?
For small game like squirrels and rabbits, the answer is yes, with the right setup. New Hampshire, for example, requires a minimum of .22 caliber delivering at least 12 fpe at the muzzle for small game. Texas allows air guns of .177 caliber or larger producing at least 600 fps for squirrels, pheasant, and quail. Most mid-range .22 caliber air rifles comfortably exceed these thresholds.
For larger animals, the bar rises dramatically. Texas requires air guns used for big game to fire a projectile of at least .30 caliber and 150 grains, producing a minimum of 215 fpe at the muzzle. That puts you squarely in the territory of high-end pre-charged pneumatic rifles, which can cost over $1,000 and operate at pressures requiring specialized tanks to fill. These guns are a different category entirely from what most people picture when they think “pellet gun.”
The general rule of thumb: 12 fpe is the minimum for a humane kill on small pests and vermin at close range. For rabbits and squirrels, 20 to 30 fpe with a .22 caliber gives you a reliable ethical range of about 30 to 40 yards. Beyond that, energy drops off fast enough that clean kills become uncertain.
Legal Power Limits
In the United States, pellet guns are largely unregulated at the federal level, and most states don’t impose a power cap. You can buy a 200+ fpe air rifle without a background check in most jurisdictions, though some cities and counties restrict discharge within city limits.
The UK takes a very different approach. Any air rifle producing more than 12 foot-pounds of muzzle energy requires a firearms certificate issued by local police. Without that certificate, you’re limited to sub-12 fpe guns. Scotland goes further: any air weapon producing more than about 0.7 fpe (one joule) requires an Air Weapon Certificate or permit. These laws effectively cap the power of what most UK shooters can legally own without paperwork, and they mean a “powerful” pellet gun in Britain is fundamentally different from one in the U.S.
Pellet Guns vs. Firearms
For perspective, a standard 9mm handgun produces around 350 to 400 fpe. A .22 LR rimfire rifle, the lightest common firearm cartridge, delivers about 140 fpe at the muzzle. A typical .177 or .22 caliber pellet gun at 25 to 35 fpe sits well below even the smallest firearm rounds. The gap narrows significantly with large-bore air rifles in .30 or .50 caliber, some of which exceed 700 fpe and genuinely compete with powder-burning guns for certain hunting applications.
Where pellet guns differ most from firearms isn’t raw energy but how quickly that energy dissipates. A firearm bullet retains lethal energy at hundreds of yards. A pellet loses half its energy within 100 yards and becomes largely ineffective well before 200. This makes pellet guns far less dangerous in terms of stray shots and overpenetration, which is one reason they’re popular for pest control in semi-rural areas where a conventional rifle would be unsafe or illegal to discharge.