Leupold BX-6 Range HD 4DOF 10x42 Rangefinding Binoculars – 185190

The Leupold BX-6 Range HD 4DOF 10x42 Rangefinding Binoculars, part number 185190, are the flagship of Leupold's rangefinding binocular line, combining a 10x42 Professional-Grade Optical System with a Class 3R laser that ranges deer to 2,000 yards (approximately 1,829 m) and reflective targets to 6,000 yards (approximately 5,486 m), and the Hornady 4DOF Ballistic Calculator for a full trajectory solution rather than just a distance.

Readings appear on a red AccuView AMOLED display and are accurate to ±0.5 yards inside 125 yards and ±2 yards out to 1,000. Bluetooth pairs the binocular to the Leupold Control App, and precision GPS pinning to within 2 degrees drops waypoints into onX Hunt, Deercast, HuntStand, Google Maps and Apple Maps. The optics give a 6.3-degree field of view — approximately 110 m at 1,000 m (330 ft at 1,000 yd) — with 18mm of eye relief, a 4.2mm exit pupil and three interchangeable Form-Fit eyecups. The waterproof and fogproof body is 173mm (6.8 in) long and 1,162 g (41 oz), running a CR123 lithium cell rated at approximately 4,000 actuations.

How It Compares

The BX-6 Range HD is the flagship of Leupold's rangefinding binocular range and sits well above the BX-4 models in both capability and price. It ranges reflective targets to 6,000 yards and deer to 2,000 yards — against 4,000 and 1,300 for the BX-4 Range HD Gen 2 10x42 — and it replaces TBR/W with the Hornady 4DOF Ballistic Calculator, which models the projectile from its drag coefficient rather than a ballistic coefficient. It also does things no BX-4 does: it pairs to the Leupold Control App over Bluetooth, and it drops precision GPS waypoints into mapping apps. Ranging accuracy is tighter close in, at ±0.5 yards to 125 yards. It is the heaviest of the six at 1,162 g, and its Class 3R laser is a step up in output from the BX-4 models' Class 1M. If you want the same 10x42 format without any of the electronics, the BX-4 Pro Guide HD Gen 2 10x42 weighs 709 g.

Ideal For

• Long-range hill stalking where a genuine ballistic solution, not just a distance, is wanted before the shot
• Stalkers and shooters who already run Hornady 4DOF data and want the calculator in the glass
• Night fox and vermin work at extended range, where the AccuView display and the longer laser reach both matter
• Hill and mountain ground where dropping an accurate GPS pin on a beast or a carcass into onX Hunt, HuntStand or Apple Maps saves an hour of searching

Key Features

• Ranging: Maximum 6,000 yards (approx. 5,486 m) on reflective targets, 3,000 yards (approx. 2,743 m) on trees and 2,000 yards (approx. 1,829 m) on deer, with a 5-yard minimum
• Accuracy: ±0.5 yards to 125 yards, ±2 yards to 1,000 yards, and ±0.5% above 1,000 yards
• Ballistics: Hornady 4DOF Ballistic Calculator — calculates the bullet's true flight path using real bullet data, working from drag coefficient rather than ballistic coefficient, and accounting for atmospherics, moving targets and earth-based effects
• Connectivity: Bluetooth pairing to the Leupold Control App to drop waypoints, adjust settings or control the rangefinder remotely; precision GPS pinning accurate to within 2 degrees, feeding onX Hunt, Deercast, HuntStand, Google Maps and Apple Maps
• Display: AccuView AMOLED display in red
• Glass: Professional-Grade Optical System with a 6.3-degree field of view and 18mm of eye relief — the most generous of the six
• Eyecups: Three interchangeable Form-Fit eyecups — winged, medium and low
• Electronics: CR123 battery rated at approximately 4,000 actuations; Class 3R laser, eye-safe and compliant with IEC 60825-1:2014-05

Technical Specifications

What's Included

• BX-6 Range HD 4DOF 10x42 rangefinding binocular
• Three sets of interchangeable Form-Fit eyecups
• Leupold does not publish a full box-contents list for this model — contact us before ordering if a specific accessory matters to you

UK Delivery & Support

Imported from the USA, duty paid by us, and dispatched tracked from the UK — nothing to pay on delivery — backed by UK-based support.

Frequently Asked Questions

What does the 4DOF calculator do that TBR/W does not?The Hornady 4DOF Ballistic Calculator works from the projectile's drag coefficient rather than its ballistic coefficient, and combines mass, shape and aerodynamic properties with atmospheric data to give a full trajectory solution, including moving targets and earth-based effects. TBR/W on the BX-4 models gives a ballistically compensated range and a wind hold, which is a simpler answer.

How far will it range on deer?Leupold rates it to 2,000 yards, approximately 1,829 metres, on deer — 3,000 yards on trees and 6,000 yards on reflective targets. Mist, rain and poor light reduce that in practice.

How accurate is it?±0.5 yards out to 125 yards, ±2 yards out to 1,000 yards, and ±0.5% beyond 1,000 yards.

What can the app do?The Leupold Control App connects over Bluetooth to drop waypoints, adjust settings or control the rangefinder remotely, and Bluetooth can be switched off when not needed. Settings update in real time and persist offline.

Which mapping apps does the GPS pinning work with?Leupold lists onX Hunt, Deercast, HuntStand, Google Maps and Apple Maps, with pinning accurate to within 2 degrees.

Is it tripod compatible?Leupold's own material is inconsistent on this point — the description refers to a tripod mount while the specification table says no — so we are not stating it either way. Please contact us before ordering if tripod mounting is essential and we will confirm with Leupold.

Where can I see the rest of the range?The full Leupold line-up is on our Leupold collection page.