Rimfire vs centerfire scope: what is actually different?
Quick answer: a rimfire scope is focused parallax-free at 50 yards and a centerfire scope at 100 yards, and that single number is the defining difference. The 50-yard setting matches the close ranges a .22 is shot at. Rimfire scopes also tend to have shorter eye relief (fine, because a .22 barely recoils) and lower magnification. You can run a centerfire scope on a .22, but at 25 to 50 yards its reticle can drift off target as your head moves; a 50-yard rimfire scope keeps aim consistent up close.
Parallax: the real difference
Parallax is the small apparent shift between the reticle and the target when your eye is not perfectly centered behind the scope. A scope is only truly parallax-free at one distance, set at the factory. Because a .22 LR is usually shot from 25 to 75 yards, rimfire scopes fix that distance at 50 yards, right in the middle of your shooting. Centerfire scopes fix it at 100 yards, because that is where a centerfire rifle is zeroed. Use a 100-yard scope up close on a .22 and small head movements make the reticle wander off the target, costing you the tiny groups a .22 is capable of.
Eye relief, magnification and build
Because a rimfire barely recoils, rimfire scopes can use shorter eye relief without any risk of scope bite, and they lean toward lower magnification (2-7x or 3-9x) and a wide field of view for close, fast targets. Centerfire scopes carry longer eye relief to clear heavy recoil and higher magnification for distance. One myth worth retiring: rimfire scopes are no longer flimsy. Modern models such as the Vortex Diamondback Rimfire use the same magnum-rated internals as centerfire optics, so the label today is about the 50-yard focus and close-range tuning, not weaker glass.
Rimfire vs centerfire at a glance
| Rimfire scope | Centerfire scope | |
|---|---|---|
| Parallax (focus) | Fixed at 50 yds (or adjustable) | Fixed at 100 yds (or adjustable) |
| Typical range | 25 to 100 yds | 100 to 1,000+ yds |
| Eye relief | Shorter is fine (low recoil) | Longer, to clear recoil |
| Magnification | Lower (2-7x, 3-9x) | Higher (3-9x to 5-25x) |
| Reticle | Simple duplex, or .22/.17 BDC | Duplex, MOA/MIL, holdover trees |
| Build | Modern ones are magnum-rated | Built for heavy recoil |
So which do you need?
- Get a rimfire scope for a .22 LR, .22 WMR or .17 HMR you shoot inside about 100 yards: the 50-yard parallax matters more than any spec. See our best rimfire scopes.
- A centerfire scope is fine if it has an adjustable objective (side focus) you can dial down to 50 yards, or if you only shoot your .22 at longer ranges.
- For a Ruger 10/22 specifically, see our best scope for a Ruger 10/22 and mount it as low as clearance allows.
FAQ
Can I use a centerfire scope on a rimfire rifle?
Yes, it will work and it is safe, but you lose a little accuracy up close. A centerfire scope is set parallax-free at 100 yards, so at the 25-to-50-yard ranges a .22 is usually shot, the reticle can appear to drift off target as your head moves behind the scope (parallax error). A rimfire scope set at 50 yards keeps your aim consistent at those closer distances.
What is the main difference between a rimfire and a centerfire scope?
The biggest difference is the parallax setting: rimfire scopes are focused parallax-free at 50 yards, centerfire scopes at 100 yards. Beyond that, rimfire scopes often have shorter eye relief (fine because a .22 barely recoils) and are tuned for close-range field of view, while centerfire scopes are built with longer eye relief for recoil and higher magnification for distance. Optically and mechanically they are otherwise similar.
Do rimfire scopes have less recoil resistance?
Not necessarily anymore. Older rimfire scopes were cheaply built because a .22 recoils so little, but modern rimfire optics like the Vortex Diamondback Rimfire use the same magnum-rated internals as centerfire scopes and even survive springer airgun recoil. So today the rimfire label is mostly about the 50-yard parallax and close-range tuning, not weaker construction.
Is a 50-yard or 100-yard parallax better for a .22?
For a .22 LR, 50 yards is better, because that is near the middle of the distances you actually shoot it, so parallax error is minimized across your normal range. A 100-yard parallax (standard on centerfire scopes) leaves the closest shots more sensitive to head position. Some rimfire scopes offer an adjustable objective so you can dial the parallax to any distance, which is ideal for .17 HMR at longer range.
Related: best rimfire scopes 2026 · parallax in a rifle scope · what distance to zero a .22 · best scope for a Ruger 10/22.