A .22 LR cartridge may carry one advertised velocity on the box, but that does not mean it will produce that velocity from every firearm.
Barrel length can make a substantial difference. A load that produces supersonic velocity from a rifle may behave very differently when fired through a short-barreled pistol. That difference can be especially important when shooting suppressed, because the ammunition’s velocity affects both its performance and the sound perceived by the shooter.
To see how significant that difference could be, Tom at Triumph Sporting Arms tested a selection of .22 LR ammunition through two suppressed firearms:
The results demonstrate why the velocity printed on an ammunition box should be treated as a reference point—not a guarantee of how that ammunition will perform from your firearm.
Several of the high-velocity loads lived up to their reputation when fired through the 18-inch rifle.
CCI Mini-Mag averaged 1,273 feet per second. Remington Viper averaged 1,260 feet per second. CCI Velocitor averaged 1,353 feet per second. Aguila Interceptor led the entire test at 1,462 feet per second.
The results changed considerably when the same loads were fired through the 4.4-inch Ruger Mark IV.
| Ammunition | 18-Inch Rifle | 4.4-Inch Pistol | Difference |
|---|---|---|---|
| Aguila Interceptor, 40 grain | 1,462 fps | 1,208 fps | -254 fps |
| CCI Velocitor, 40 grain | 1,353 fps | 1,041 fps | -312 fps |
| CCI Mini-Mag, 40 grain | 1,273 fps | 1,059 fps | -214 fps |
| Remington Viper, 36 grain | 1,260 fps | 1,036 fps | -224 fps |
| CCI Standard Velocity, 40 grain | 1,103 fps | 961 fps | -142 fps |
| Federal Suppressor, 45 grain | 873 fps | 879 fps | +6 fps |
| CCI Quiet, 40 grain | 760 fps | 652 fps | -108 fps |
The Velocitor experienced the largest average reduction among these selected loads, losing 312 feet per second when moving from the rifle to the pistol.
Mini-Mag and Viper also lost more than 200 feet per second. Both were substantially faster from the rifle but remained below 1,100 feet per second on average from the pistol used in this test.
Tom’s original observation was that most .22 LR ammunition is likely to remain subsonic when fired from a pistol—but that Aguila Interceptor is unusually hot.
The chronograph results support that conclusion.
Aguila Interceptor averaged 1,208 feet per second from the 4.4-inch pistol. Its slowest recorded pistol shot was 1,177 feet per second, while its fastest reached 1,267 feet per second.
It also produced considerably more calculated muzzle energy than the other pistol loads:
For shooters seeking the greatest velocity and energy among the ammunition tested, Aguila Interceptor was the clear leader. For someone trying to minimize the ballistic crack associated with supersonic ammunition, however, that additional velocity may be undesirable.
That illustrates an important point: the “best” ammunition depends on what the shooter is trying to accomplish.
The results also show that ammunition does not lose a fixed amount of velocity when it is fired through a shorter barrel.
For example, CCI Velocitor lost 312 feet per second, while CCI Standard Velocity lost 142 feet per second. CCI Quiet lost 108 feet per second.
Federal Suppressor was especially interesting. It averaged 873 feet per second from the rifle and 879 feet per second from the pistol—a difference of only six feet per second. That small difference is well within the normal shot-to-shot variation observed during the test and should not be interpreted as evidence that the pistol made the ammunition faster.
Instead, it shows that Federal Suppressor produced very similar average velocities from these two particular firearms.
Different powders, bullet weights, chamber dimensions, firearm tolerances, and barrel lengths can all affect the final result. This is why ammunition should be evaluated in the firearm in which it will actually be used.
The rifle results also explain Tom’s recommendation to consider standard-velocity ammunition when shooting a suppressed .22 LR rifle.
Several loads marketed for greater velocity produced averages well above the standard-velocity loads when fired through the 18-inch barrel. That additional velocity may provide more energy, but it can also work against the goal of obtaining the mildest possible suppressed report.
Loads such as CCI Standard Velocity, Eley Match, Eley Contact, Eley Bench Rest Outlaw, Eley Club, Federal Suppressor, CCI Suppressor, CCI Quiet, and RWS Subsonic all averaged below the higher-velocity offerings in the rifle test.
That does not make the high-velocity loads bad ammunition. It simply means their advantages and disadvantages change depending on the firearm and the shooter’s objective.
The most important lesson is not that one .22 LR load is right for everyone.
It is that ammunition performance is firearm-dependent.
A load that is fast from an 18-inch rifle may lose several hundred feet per second from a short-barreled pistol. A cartridge that produces the desired suppressed performance in one platform may create a very different result in another. Even ammunition bearing the same caliber designation can vary significantly in velocity, energy, consistency, sound, and function.
For this reason, shooters should test their chosen ammunition in the firearm they intend to use. Published velocities and chronograph comparisons are helpful starting points, but they cannot replace testing the actual combination of firearm, barrel, suppressor, and ammunition.
In this particular test, most of the ammunition fired through the Ruger Mark IV remained substantially slower than it was through the Ruger Precision Rimfire. Aguila Interceptor was the notable exception, producing the highest pistol velocity and energy by a wide margin.
When choosing .22 LR ammunition, the right question is not simply, “Which load is fastest?”
The better question is, “Which load produces the performance I want from my firearm?”
These results apply to the specific firearms, suppressor, ammunition samples, and testing conditions used. Results may vary with a different firearm, barrel length, suppressor, ammunition lot, temperature, elevation, or chronograph setup. Chronograph data does not by itself establish accuracy, terminal performance, reliability, or suitability for a particular purpose.
