Picking the right riflescope for extreme long-range (ELR) shooting is critical to maximize your ability to hit long-range targets. ELR scopes have to handle the unique challenges when shooting at extreme distances, and there are a few factors you must look at: precise adjustments, glass clarity, MOA, reticle, and the potential environmental factors.
ELR targets are 36x36; that size shrinks dramatically at a mile or more out. A high variable magnification range (25x-36x) provides the zoom needed to clearly see a target at that extreme range while allowing for flexibility when viewing targets at closer ranges (500 to 1000 yards).
For ELR shooting, you want a first-focal plane reticle. FFP reticles will scale with the magnification of your riflescope, ensuring your holdover and windage markers remain accurate across the zoom range. A grid-style or mil-based reticle will offer precise hold points on elevation and wind, which are critical for the ELR environment. Illumination with adjustable brightness is also helpful, allowing you to see your crosshair in low-light conditions or cluttered backgrounds.
With ELR shooting, you need elevation travel to account for the significant bullet drop at extreme ranges. A scope with at least 100 MOA (30 MRAD) of elevation adjustment to cover a mile and beyond shots, even with larger calibers. A high-quality, high MOA mount can also help with any additional MOA you require. You must watch the bell housing and the clearance between your rail.
Glass clarity is everything when it comes to spotting targets at range through heat mirage and low-light distances. You want high-quality glass, like ED or HD lenses, with a 90%+ light transmission to deliver a bright, sharp image. A large objective lens (50-56mm) will gather more light, increasing visibility at dawn or dusk. Lens coating, like anti-reflective or anti-fouling coating, should also be considered to reduce glare while resisting dust or scratching, ensuring you have a clear sight picture in any ELR environment.
Precise turrets with repeatability are crucial for consistently dialing elevation and windage. Look for locking or capped windage turrets to prevent accidental shifts, and zero-stop or zero-reset elevation turrets for rapid returns to zero. A tactile turret with audible clicks will allow you to feel and hear your adjustments, even under the stress of competition shooting. A visible and clear revolution indicator will allow you to track multi-rotation adjustments vital for extreme long-range elevation.
