The .22 Long Rifle is the most heavily produced cartridge in the world, relying on a very small charge of fast-burning rimfire powder to achieve optimal speeds.
When firing a standard-velocity 40-grain bullet, muzzle velocities average approximately 880 fps from a 4-inch pistol barrel and 1,070 fps from a 16-inch rifle barrel.
The cartridge typically reaches its maximum velocity between 16 and 18 inches, peaking around 1,075 fps before internal bore friction begins to actively reduce speed in 20-inch and 24-inch barrels.
High-velocity variants push lighter bullets past 1,235 fps, while standard and dedicated subsonic loads remain safely below the sound barrier regardless of barrel length.
Analyzing these chronograph statistics allows shooters to select the perfect barrel length for hunting, precision target shooting, or suppressed plinking.
22 LR Velocity Chart
| Barrel Length | Load | Bullet Weight | Muzzle Velocity | Velocity Difference |
| 4 inches | CCI Standard Velocity | 40 grain | 880 fps | – |
| 10 inches | CCI Standard Velocity | 40 grain | 1,010 fps | +130 fps |
| 16 inches | CCI Standard Velocity | 40 grain | 1,070 fps | +60 fps |
| 18 inches | CCI Standard Velocity | 40 grain | 1,075 fps | +5 fps |
| 24 inches | CCI Standard Velocity | 40 grain | 1,050 fps | -25 fps |
How Much Velocity Does 22 LR Gain From Barrel Length?
Unlike centerfire rifle cartridges that continue to gain speed in 24-inch or 26-inch barrels, the .22 LR operates on a strict bell curve. Because the rimfire casing holds only a tiny pinch of fast-burning powder, combustion is completed very early in the barrel’s length.
Moving from a 4-inch pistol barrel to a 10-inch barrel yields massive gains, averaging roughly 20 to 25 fps per inch. Between 10 and 16 inches, the gains slow down to about 10 fps per inch. Once the bullet passes the 16 to 18-inch mark, there is no expanding gas left to accelerate it. Pushing the soft lead bullet through additional barrel length past 18 inches induces negative velocity; the friction of the rifling grabs the bullet and slows it down, causing a 24-inch barrel to shoot roughly 20 to 25 fps slower than a 16-inch barrel.
Does Barrel Length Affect 22 LR Velocity?
Yes, barrel length drastically affects .22 LR velocity, but it uniquely penalizes both extremely short and extremely long barrels.
Cutting a barrel from a standard 16 inches down to a 4-inch pistol length strips roughly 190 fps from the muzzle velocity, drastically reducing the cartridge’s kinetic energy. Conversely, extending the barrel to 24 inches also reduces velocity. If shooters record wildly different velocities from the exact same barrel length, the discrepancy is almost always caused by ammunition lot variations, rimfire primer inconsistencies, temperature shifts, or differences in bore tightness (such as match-grade chambers).
22 LR Supersonic Velocity By Barrel Length
High Velocity (HV) and Hyper-Velocity .22 LR ammunition are loaded with specific powder charges designed to aggressively break the sound barrier (roughly 1,125 fps at sea level).
- 40 Grain (High Velocity): The standard HV load (like the CCI Mini-Mag) averages roughly 1,050 fps in a 4-inch pistol and reaches 1,235 fps in a 16-inch rifle barrel.
- 36 Grain (Hollow Point): Slightly lighter bullets are used to increase speed for varmint hunting. They typically hit 1,260 fps from a 16-inch barrel.
- 32 Grain (Hyper-Velocity): Specialty loads like the CCI Stinger utilize a slightly longer casing and lightweight bullets to push velocities to a blistering 1,640 fps out of a 16-inch barrel, though they also begin to lose speed in barrels longer than 18 inches.
22 LR Subsonic Velocity By Barrel Length
Standard velocity .22 LR ammunition is intentionally loaded to stay below the speed of sound, making it the preferred choice for precision target shooting and suppressor use.
- 40 Grain (Standard Velocity): Loads like CCI Standard Velocity or Federal AutoMatch typically clock roughly 1,070 fps out of a 16-inch barrel. Because they never break the sound barrier, they do not experience transonic destabilization, making them much more accurate at 100 yards than High Velocity rounds.
- 45 Grain (Dedicated Subsonic): Heavy subsonic loads designed specifically for suppressors will yield about 990 to 1,020 fps from a 16-inch barrel.
- Pistol Suppression: Because a 4-inch barrel limits powder burn time, even standard High Velocity 40-grain rounds (rated for 1,235 fps in rifles) will usually exit a pistol around 1,050 fps, effectively turning bulk HV ammo into subsonic ammo for handgun shooters.
22 LR 4 Inch Barrel Velocity
A 4-inch barrel is standard for popular target pistols like the Ruger Mark IV, Browning Buck Mark, or Glock 44.
- 40-Grain Standard Load: Averages approximately 880 fps.
- Considerations: The short barrel limits kinetic energy to under 70 ft-lbs, but it keeps virtually all standard and high-velocity ammunition subsonic, making 4-inch pistols exceptional suppressor hosts.
22 LR 16 Inch Barrel Velocity
The 16-inch barrel is the legal minimum for rifles in the US and the absolute most popular length for semi-autos like the Ruger 10/22.
- 40-Grain Standard Load: Reaches approximately 1,070 fps.
- Considerations: This length extracts roughly 99% of the cartridge’s velocity potential, providing optimal kinetic energy without adding unnecessary friction or rifle weight.
22 LR 18 Inch Barrel Velocity
An 18-inch barrel is commonly found on premium bolt-action rimfire rifles like the CZ 457 or Tikka T1x.
- 40-Grain Standard Load: Peaks at roughly 1,075 fps.
- Considerations: This is the absolute ballistic apex for the .22 LR cartridge. It provides complete powder combustion and peak speed before internal bore friction can take effect.
22 LR 24 Inch Barrel Velocity
A 24-inch (or longer) barrel is traditionally used on vintage target rifles, such as old Winchesters or the modern CZ Jaguar.
- 40-Grain Standard Load: Drops to approximately 1,050 fps.
- Considerations: The extra length actively robs the bullet of kinetic energy due to internal friction. Shooters only use these lengths to maximize the sight radius for iron sights, improving mechanical aiming precision despite the slight speed penalty.
22 LR Velocity And Energy By Barrel Length
The following table calculates muzzle energy based on tested velocity averages for a standard 40-grain CCI Standard Velocity load.
| Barrel Length | Bullet Weight | Velocity | Muzzle Energy |
| 4 inches | 40 grain | 880 fps | 69 ft-lbs |
| 10 inches | 40 grain | 1,010 fps | 91 ft-lbs |
| 16 inches | 40 grain | 1,070 fps | 102 ft-lbs |
| 18 inches | 40 grain | 1,075 fps | 103 ft-lbs |
| 24 inches | 40 grain | 1,050 fps | 98 ft-lbs |
Practical Applications
Understanding how barrel length affects .22 LR determines your firearm and ammunition choices:
- Small Game Hunting: Supersonic velocity is critical for humane kills on small game if you want hollow points to expand reliably. A 16-inch barrel paired with High Velocity (1,235 fps) ammo is the standard hunting setup.
- Precision Target Shooting: Standard Velocity (subsonic) ammunition from a 16 to 20-inch heavy-barreled bolt action yields the best accuracy, as the bullet never experiences the turbulent transonic shockwave that degrades accuracy at 75+ yards.
- Suppressed Handguns: A 4-inch pistol keeps almost all bulk ammunition hovering around 1,050 fps, allowing shooters to plink quietly without buying expensive dedicated subsonic rounds.
What Is The Best Barrel Length For 22 LR?
The chronograph data definitively proves that the 16-inch to 18-inch range is the optimal barrel length for the .22 LR cartridge.
Because the tiny rimfire case holds only 1 to 2 grains of powder, the expanding gases run out of pushing power shortly after the 16-inch mark. An 18-inch barrel pushes 40-grain standard bullets to 1,075 fps (and High Velocity loads to 1,240 fps), wringing out the absolute maximum kinetic energy while keeping the rifle perfectly balanced. If a shooter opts for a 20-inch or 24-inch barrel, they are simply carrying around extra steel that actively slows their bullet down via friction. For any application utilizing modern optics, the 16-inch to 18-inch barrel is mathematically and practically superior.
Pros and Cons
Short Barrel Pros (4-10 Inches)
- Superior agility for handguns and short-barreled rifles (SBRs).
- Naturally reduces “High Velocity” ammunition to subsonic speeds, making it quiet when suppressed.
- Extremely lightweight to carry on the trail.
Short Barrel Cons (4-10 Inches)
- Drastic velocity loss (dropping to 850 – 900 fps for standard loads).
- Fails to provide enough speed for hollow points to reliably expand on game.
- Reduced kinetic energy (under 70 ft-lbs in pistols).
Optimal Barrel Pros (16-18 Inches)
- Achieves absolute peak muzzle velocity and downrange energy.
- Fully combusts the powder charge, keeping the rifle action and suppressor cleaner.
- Perfectly balances rifle weight and handling characteristics.
Over-Length Barrel Cons (20-24+ Inches)
- Actively slows the bullet down due to bore friction.
- Adds unnecessary weight to a low-recoil rifle.
- Only beneficial for shooters requiring an extended iron sight radius.
22 LR Velocity: What The Data Shows
Chronograph data exposes a unique ballistic reality for the .22 LR: longer is definitively not faster. While an 18-inch barrel produces the absolute peak tested velocity (roughly 1,075 fps for standard loads), the speed difference compared to a compact 16-inch carbine (1,070 fps) is practically zero.
By analyzing the data curve, shooters can see that moving past 18 inches actively damages the cartridge’s performance, with 24-inch barrels dropping speeds back down by roughly 25 fps. Conversely, dropping down to a 4-inch pistol barrel strips nearly 190 fps from the load, completely dropping muzzle energy to a meager 69 ft-lbs. Ultimately, the data proves that a 16-inch or 18-inch barrel is the undisputed king for extracting maximum performance from any .22 LR ammunition.
FAQs
How fast is 22 LR from a 4-inch barrel?
From a 4-inch pistol barrel, standard 40-grain .22 LR averages roughly 880 fps, while High Velocity loads average about 1,050 fps. Both generally remain subsonic.
How fast is 22 LR from a 16-inch barrel?
A standard 16-inch rifle barrel pushes 40-grain standard velocity loads to approximately 1,070 fps, and High Velocity loads to roughly 1,235 fps.
How fast is 22 LR from a 24-inch barrel?
Due to internal bore friction, a 24-inch barrel slows the bullet down compared to shorter rifles, averaging roughly 1,050 fps for standard velocity loads.
Does barrel length affect 22 LR velocity?
Yes. The cartridge gains speed rapidly up to 16 inches, hits its absolute peak around 18 inches, and then loses speed in any barrel longer than 18 inches due to friction.
How much velocity does 22 LR lose per inch?
When cutting a barrel from 16 inches down to 4 inches, it loses an average of 15 to 20 fps per inch. When increasing a barrel from 18 inches to 24 inches, it loses roughly 3 to 4 fps per inch.
What is the fastest 22 LR barrel length?
Chronograph testing universally shows that 16-inch to 18-inch barrels produce the absolute fastest velocities for the .22 LR cartridge.
What is the best barrel length for 22 LR?
The 16-inch to 18-inch range is widely considered optimal. It extracts peak velocity, fully combusts the powder, and keeps the rifle highly maneuverable.
Does 22 LR gain velocity from a longer barrel?
No. Once the barrel exceeds 18 inches, the .22 LR stops gaining velocity and actually begins to slow down as friction overtakes gas pressure.
How fast is subsonic 22 LR?
Dedicated subsonic or standard velocity .22 LR ammunition is loaded to travel around 1,050 to 1,070 fps out of a rifle to avoid the supersonic crack.
How fast is supersonic 22 LR?
High Velocity .22 LR travels between 1,235 and 1,260 fps, while Hyper-Velocity loads (like the Stinger) can exceed 1,600 fps.
What is the velocity difference between a 4 and 16 inch 22 LR barrel?
For a standard 40-grain load, the velocity difference is roughly 190 fps (880 fps vs. 1,070 fps), which translates to a nearly 50% increase in kinetic energy for the rifle.