Is ELEY subsonic Ammunition Actually Subsonic Out of a Short Barrel?
ELEY subsonic hollow is designed for standard rifle barrel lengths. That is the direct answer: the round is engineered to deliver its published 305-317 m/s (1000-1040 ft/s) from a standard-length rifle barrel, and in a rifle of that description it does exactly what the box says. ELEY contact, the other cartridge in the subsonic range, is published at 317-332 m/s (1040-1090 ft/s).
If your barrel is shorter than standard, the honest and useful answer is that your rifle produces its own figure, and it is easy to find out what that figure is. That is not a caveat; it is simply how rimfire ballistics work, and it is the same reason ELEY quotes bands rather than a single number.
What the Published Velocity Band Actually Represents
ELEY tests 200 rounds from every batch it manufactures, fired across four different firearm brands. That test is what generates the accuracy figure for the batch, and it is also what generates the velocity data.
Because the test spans four barrels rather than one, the published figure describes the product’s behaviour across a range of firearms rather than any single rifle. A band of 305-317 m/s is the honest way to express a result gathered that way; one decimal-precise number from one barrel would look more authoritative and mean considerably less.
Bore dimensions, throat, twist, wear, internal finish and length make every barrel unique, and each batch of ammunition performs differently. What performs flawlessly in one barrel may not deliver the same result in another. That principle applies to velocity just as much as it applies to group size.
The Number Printed on Your Packaging
ELEY prints a batch code on its packaging in the format 10 26-04 244 over 1045. Each element carries meaning:
| Element | Meaning |
|---|---|
| 10 | Loaded product |
| 26 | Year of manufacture |
| 04 | Loader number |
| 244 | Batch number for that loader |
| 1045 | Mean velocity across four barrels during proofing |
That final four-digit figure answers this question most directly. It is the mean velocity for that specific batch, measured across four barrels during proofing. That is a batch-level measurement, not a range-wide marketing figure. If you want to know how much margin a batch is carrying below the sound barrier, that is where to start: a batch sitting towards the lower end of its product’s published band carries more margin than one near the top.
Going Deeper: The Lot Analyser
A free account at eleyxshot.com gives access to the ELEY Lot Analyser, where entering a batch number opens the proof data behind it: velocity, group size, shot distribution, date loaded, ballistic coefficient, trajectory, and radial dispersion across four barrel types, along with the full 200-shot proof group with X (windage) and Y (elevation) coordinates for every shot.
The Lot Analyser now carries all lots of ELEY tenex, tenex pistol, tenex biathlon, tenex rapid fire pistol, match, semi-auto .22LR benchrest precision, ultra and club. For ELEY subsonic hollow and ELEY contact, the reference figure is the four-digit velocity number in the batch code on the packaging. That is the number this question turns on anyway.
What Your Own Barrel Is Doing
The definitive answer for your rifle comes from your rifle, and getting it takes one range session. A chronograph in front of your own muzzle, shooting the batch you actually own, gives you the one number no published band can: what that ammunition does out of that barrel, at the temperature you shoot in.
Fire a meaningful string rather than three rounds, and note the batch number alongside the result. Do that once and you have a reference you can rely on every time you buy again, rather than a question you keep re-asking. If the result sits comfortably below the sound barrier, you have your answer and you can buy that batch with confidence.
Choosing With Margin in Mind
If subsonic performance from a short barrel is the priority, two things stack in your favour. Choose the product with the lower published band: ELEY subsonic hollow at 305-317 m/s (1000-1040 ft/s) sits below ELEY contact at 317-332 m/s (1040-1090 ft/s). Then treat the batch code velocity figure as a selection tool rather than a curiosity, and buy consistently from batches you have verified.
The Bottom Line
ELEY subsonic hollow is designed for standard rifle barrel lengths, and ELEY’s subsonic products are loaded to published bands that sit below the sound barrier. Those bands are mean velocities measured across four barrels during proofing, so if your rifle is shorter than standard, the number that matters is the one your own barrel produces.
Read the four-digit velocity figure in the batch code on your packaging, then confirm it with a chronograph in front of your own muzzle. To take it further, book a session at eley.co.uk/vip and test batches through your own barrel. ELEY ammunition is supplied in 50-round boxes, 500-round bricks and 5,000-round outer cases, and stockists are listed at eley.co.uk/retailers. Once you know which batch your rifle likes, buying it in the quantity you need is straightforward.