- Winchester’s .22 LR Lineup at a Glance
- Full Product Comparison Table
- Super-X — The Heritage Hunting Load
- Wildcat — Budget Plinking Done Right
- M-22 — Built for Semi-Auto Volume Shooting
- M-22 Subsonic — Suppressor-Optimized Rimfire
- Super Suppressed — Winchester’s Quietest Option
- Barrel Length and Velocity — What You Actually Get
- Matching the Right Winchester Load to Your Purpose
- Frequently Asked Questions
1. Winchester’s .22 LR Lineup at a Glance
Winchester has been loading rimfire ammunition since the cartridge’s earliest days, and their current .22 LR catalog reflects that depth of experience. From high-velocity hunting loads to purpose-built suppressor rounds, they cover every use case a rimfire shooter might need — and they do it at price points that range from budget bulk packs to match-grade precision.
What separates Winchester from some competitors is the breadth of their lineup. Where brands like CCI focus on a handful of carefully optimized loads, Winchester takes a wider approach. You get dedicated lines for semi-auto reliability (M-22), suppressed shooting (M-22 Subsonic and Super Suppressed), small game hunting (Super-X), and pure-volume plinking (Wildcat). Each line is engineered for a specific job, and understanding those distinctions helps you avoid buying the wrong box.
This guide breaks down every current Winchester .22 LR load with real-world velocity data, reliability notes, and honest assessments of where each product shines — and where it falls short. If you’re stocking up on rimfire, browse Winchester .22 LR ammo at Tatted Tacticals.
2. Full Product Comparison Table
Before we dive into individual loads, here’s the complete Winchester .22 LR lineup side by side. This table gives you the quick reference you need to compare bullet weight, velocity, and intended use at a glance.
| Product Line | Bullet Weight | Bullet Type | Muzzle Velocity | Primary Use | Pack Sizes |
|---|---|---|---|---|---|
| Super-X HV | 37 gr | Plated HP | 1,280 fps | Small Game Hunting | 50, 100 |
| Super-X HV | 40 gr | Plated RN | 1,255 fps | General Purpose | 50, 100, 500 |
| Wildcat | 40 gr | LRN | 1,255 fps | Budget Plinking | 500 |
| M-22 | 40 gr | Plated RN | 1,255 fps | Semi-Auto Training | 500, 1,000, 2,000 |
| M-22 Subsonic | 45 gr | Plated RN | 1,090 fps | Suppressed Semi-Auto | 800 |
| Super Suppressed | 45 gr | Plated RN | 1,090 fps | Suppressed (All Platforms) | 100 |
Key takeaway: Winchester covers the full velocity spectrum from 1,090 fps subsonic to 1,280 fps high-velocity. Your choice comes down to intended use — hunting, volume training, or suppressed shooting.
3. Super-X — The Heritage Hunting Load
Winchester Super-X is the oldest continuously produced .22 LR line in America. The current high-velocity offerings come in two configurations: a 37-grain plated hollow point at 1,280 fps and a 40-grain plated round nose at 1,255 fps. Both use copper-plated bullets for cleaner feeding and reduced barrel fouling compared to bare lead.
37-Grain Hollow Point Performance
The 37-grain HP is Winchester’s small game load. The lighter bullet at higher velocity creates reliable expansion on squirrels, rabbits, and similar-sized game out to about 50 yards. From a rifle barrel, expect around 135 ft-lbs of muzzle energy — adequate for clean kills on small game with proper shot placement. The hollow point design opens consistently above 1,050 fps, which gives you roughly 75 yards of effective expansion range from a 16-inch barrel.
40-Grain Round Nose Performance
The 40-grain round nose is the general-purpose option. It’s accurate enough for informal target work, reliable in most firearms, and affordable enough for moderate-volume shooting. You won’t get the terminal performance of the hollow point, but the round nose feeds more reliably in older firearms and tube-fed rifles.
Key takeaway: Super-X is your go-to if you’re hunting small game with a .22 LR. The 37-grain HP offers genuine terminal performance that budget loads can’t match. For everything else, the 40-grain RN is a solid all-rounder.
4. Wildcat — Budget Plinking Done Right
Winchester Wildcat is the value play in their lineup. It’s a 40-grain lead round nose bullet at 1,255 fps — the same velocity as Super-X — but with a bare lead bullet instead of a plated one, and sold exclusively in 500-round bricks at a lower per-round cost.
What You Get for the Price
Wildcat ammunition uses a standard-velocity powder charge with a simple wax-lubricated lead bullet. The lack of copper plating means more barrel fouling over extended sessions, but it also means a lower manufacturing cost that gets passed to you. Accuracy is acceptable for plinking and informal target shooting — you can expect roughly 2-3 MOA from a decent bolt-action rifle at 50 yards, which opens up to 3-4 MOA in semi-autos.
Reliability Considerations
The lead round nose profile feeds well in most firearms, but the wax lube can build up in semi-auto actions during long shooting sessions. Plan to wipe down your bolt face and feed ramp every 200-300 rounds if you’re running Wildcat through a 10/22 or similar platform. Rimfire ignition is generally consistent, though you may encounter slightly higher dud rates compared to premium lines — a reality with any budget rimfire ammunition.
Key takeaway: Wildcat is the right choice when round count matters more than precision. It’s range day ammunition — nothing more, nothing less — and it does that job at a price that’s hard to argue with.
5. M-22 — Built for Semi-Auto Volume Shooting
Winchester designed the M-22 line specifically for high-volume semi-automatic shooting. The 40-grain copper-plated round nose bullet at 1,255 fps is loaded to cycle reliably in platforms like the Ruger 10/22, Smith & Wesson M&P 15-22, and similar semi-auto rifles and pistols.
What Makes M-22 Different from Wildcat
On paper, M-22 and Wildcat share the same bullet weight and velocity. The differences are in the details. M-22 uses a copper-plated bullet for cleaner feeding, tighter quality control on powder charges for more consistent cycling, and a black copper wash that reduces leading. The result is fewer failures to feed, fewer failures to eject, and less fouling buildup during extended range sessions.
Bulk Pack Reality
M-22 is sold in 500-round, 1,000-round, and 2,000-round bulk packs. Winchester markets it as a “1,000 rounds between cleanings” product, and in practice, that claim holds up reasonably well in clean, well-maintained semi-autos. The plated bullet and consistent overall length contribute to smooth feeding, even from high-capacity magazines.
Accuracy Expectations
M-22 is training ammunition, not match ammunition. Expect 2-3 MOA at 50 yards from a bolt-action and 3-5 MOA from a semi-auto. That’s plenty accurate for steel plate work, action shooting practice, and general skill development. If you need tighter groups, step up to CCI Standard Velocity or Lapua Center-X — but you’ll pay significantly more per round.
Key takeaway: M-22 is the best Winchester option for semi-auto training. The copper plating and consistent loading justify the modest price premium over Wildcat if you’re running a 10/22 or similar platform.
6. M-22 Subsonic — Suppressor-Optimized Rimfire
The M-22 Subsonic loads a 45-grain plated round nose at 1,090 fps — safely below the speed of sound to eliminate the supersonic crack when fired through a suppressor. Winchester engineered this load specifically to cycle semi-automatic actions while staying subsonic, which is a genuine engineering challenge in .22 LR.
The Semi-Auto Subsonic Problem
Most subsonic .22 LR loads run between 1,000 and 1,050 fps. That’s quiet through a suppressor, but it often doesn’t generate enough blowback energy to cycle a semi-auto action. The M-22 Subsonic addresses this by pushing to 1,090 fps — still subsonic (the speed of sound at sea level is approximately 1,125 fps), but close enough to the threshold that it generates adequate cycling energy in most semi-auto platforms.
Suppressor Performance
Paired with a quality rimfire suppressor, M-22 Subsonic reduces report to roughly 113-118 dB at the muzzle, depending on barrel length and suppressor model. That’s comparable to a quiet conversation at the shooter’s ear. The 45-grain bullet provides a ballistic coefficient of approximately .125, which means more wind drift than standard-velocity loads — plan accordingly beyond 50 yards.
Cycling Reliability
In 800-round bulk packs, you can expect reliable cycling in most semi-autos designed for subsonic use. Platforms with adjustable gas systems or lighter bolt assemblies (like the Ruger Mark IV or dedicated suppressed 10/22 builds) perform best. Stock semi-autos with heavy factory recoil springs may experience occasional short-stroking.
Key takeaway: M-22 Subsonic is the Winchester load to buy if you shoot suppressed with a semi-auto. The 1,090 fps velocity threading the needle between “subsonic quiet” and “enough energy to cycle” is the whole point of this product.
7. Super Suppressed — Winchester’s Quietest Option
Winchester Super Suppressed shares the same 45-grain plated round nose bullet and 1,090 fps velocity as M-22 Subsonic, but it’s packaged in 100-round boxes rather than 800-round bulk packs. The key difference is in the intended platform and quality control focus.
Super Suppressed vs M-22 Subsonic
While M-22 Subsonic is optimized for semi-auto cycling, Super Suppressed is designed as a more universally compatible subsonic option. It works well in bolt-action rifles, lever guns, revolvers, and semi-autos alike. The smaller box size suggests Winchester positions this as a precision-oriented subsonic load rather than a high-volume training round.
When to Choose Super Suppressed
If you shoot suppressed through a bolt-action .22 LR — which is the quietest possible rimfire setup — Super Suppressed gives you consistent subsonic velocities without paying for bulk quantities you don’t need. The 100-round box size is practical for shooters who use their suppressed .22 for pest control, backyard shooting, or precision work rather than high-volume range days.
Key takeaway: Super Suppressed is the bolt-action and revolver shooter’s subsonic option. If you’re running a semi-auto suppressed, M-22 Subsonic in the 800-round bulk pack is the better value.
8. Barrel Length and Velocity — What You Actually Get
Winchester’s advertised velocities are measured from a standard test barrel. Your actual muzzle velocity depends heavily on your barrel length. Here’s what to expect from Winchester’s main loads across common barrel lengths.
| Winchester Load | 2″ (Pistol) | 4.5″ (Pistol) | 16″ (Rifle) | 18″ (Rifle) |
|---|---|---|---|---|
| Super-X 37gr HP | ~950 fps | ~1,080 fps | ~1,240 fps | ~1,270 fps |
| M-22 40gr RN | ~920 fps | ~1,060 fps | ~1,215 fps | ~1,245 fps |
| M-22 Subsonic 45gr | ~850 fps | ~980 fps | ~1,060 fps | ~1,080 fps |
Notice that M-22 Subsonic stays subsonic from all barrel lengths listed — that’s by design. The high-velocity loads lose significant speed from short pistol barrels, dropping the Super-X 37gr HP below the 1,050 fps expansion threshold from a 2-inch barrel. If you’re using a short-barreled pistol for pest control, keep engagement distances under 15 yards with hollow points.
Key takeaway: Your barrel length determines your real-world velocity. Winchester’s advertised numbers assume a test barrel — check the table above to know what your specific firearm will actually deliver.
9. Matching the Right Winchester Load to Your Purpose
With five distinct product lines, choosing the right Winchester .22 LR comes down to how you shoot. Here’s the straightforward breakdown.
Small Game Hunting
Pick: Super-X 37gr HP. The hollow point provides reliable expansion on squirrels, rabbits, and similar game. Use a rifle with at least a 16-inch barrel to maintain velocities above the expansion threshold out to 75 yards.
High-Volume Semi-Auto Training
Pick: M-22 40gr. The copper-plated bullet and consistent loading minimize malfunctions during extended range sessions. Buy the 1,000 or 2,000-round packs for the best per-round cost.
Budget Plinking
Pick: Wildcat 40gr. Acceptable accuracy, reliable ignition, lowest cost per round. Best in bolt-actions and revolvers where the lead bullet’s fouling tendency matters less.
Suppressed Semi-Auto Shooting
Pick: M-22 Subsonic 45gr. Engineered to cycle semi-autos while staying subsonic. The 800-round bulk pack is the right value for high-volume suppressed shooting.
Suppressed Bolt-Action or Revolver
Pick: Super Suppressed 45gr. Same ballistics as M-22 Subsonic without paying for bulk you don’t need. Ideal for precision pest control and low-volume suppressed shooting.
General Rifle Target Shooting
Pick: Super-X 40gr RN. The copper plating keeps your barrel cleaner than Wildcat, and the round nose feeds reliably in everything from tube-fed lever guns to bolt-actions.
Key takeaway: Winchester makes a .22 LR for every application. Match the load to the job and you’ll get reliable, consistent performance without overpaying for features you don’t need.
10. Frequently Asked Questions
Is Winchester M-22 good ammo?
M-22 is good semi-auto training ammo. It’s designed for reliable cycling in platforms like the 10/22 and AR-22. It’s not match-grade — expect 3-5 MOA from a semi-auto — but for steel plate work and general skill development, it’s one of the better bulk options available. The copper-plated bullet runs cleaner than bare lead alternatives.
What is the difference between Winchester Wildcat and M-22?
Both are 40-grain loads at 1,255 fps, but M-22 uses a copper-plated bullet while Wildcat uses bare lead. M-22 feeds more reliably in semi-autos, fouls less, and has tighter quality control. Wildcat costs less per round. For bolt-actions and revolvers, Wildcat is fine. For semi-autos, M-22 is worth the premium.
Will Winchester M-22 Subsonic cycle a 10/22?
In most cases, yes. The 1,090 fps velocity generates enough blowback to cycle stock 10/22 actions. However, if you’ve added a heavier aftermarket bolt or recoil spring, you may experience occasional short-stroking. A lighter bolt or reduced-power spring improves subsonic reliability significantly.
Is Winchester Super-X .22 LR good for squirrel hunting?
The Super-X 37-grain hollow point is excellent for squirrel hunting. The high velocity creates reliable expansion, and the plated bullet feeds smoothly in semi-autos. Keep shots under 50 yards for clean kills and use a rifle barrel (not a pistol) to maintain adequate expansion velocity.
What Winchester .22 LR ammo is best for a suppressor?
For semi-autos, use M-22 Subsonic (45-grain, 1,090 fps). For bolt-actions and revolvers, use Super Suppressed (same ballistics, smaller box size). Both stay subsonic from all common barrel lengths, eliminating the supersonic crack that defeats the purpose of a suppressor.
How accurate is Winchester Wildcat ammo?
Expect approximately 2-3 MOA at 50 yards from a bolt-action rifle and 3-4 MOA from a semi-auto. That’s adequate for plinking and informal target work but not competitive for benchrest or precision rimfire disciplines. For better accuracy at a moderate price, consider CCI Standard Velocity or Winchester’s own Super-X line.
Ready to stock up on Winchester .22 LR? Shop Winchester .22 LR ammo at Tatted Tacticals and find the right load for your next range day.
