An "Automatic" Smart Scope: The Sierra 3 BDX From Sig

Published on November 10, 2019
Duration: 8:59

The Sig Sauer Sierra 3 BDX offers an integrated smart scope solution by pairing a rangefinder with a scope via Bluetooth to automate holdovers. While it simplifies elevation adjustments by illuminating correct holdover dots, users must still manually input wind data into the app for windage corrections. This entry-level smart optic, with an MSRP around $600, is a good option for new shooters, though it has limitations like fixed parallax and a less intuitive windage dot placement.

Quick Summary

The Sig Sierra 3 BDX smart scope automates elevation holdovers by wirelessly connecting a Kilo rangefinder to the scope via Bluetooth. Upon ranging a target, the scope illuminates the correct holdover dot. However, windage adjustments require manual input of wind data into the BDX app.

Chapters

  1. 00:00Intro to Smart Scopes
  2. 00:22Sig BDX System Components
  3. 01:17Setup & Ballistic Data
  4. 02:23Field Application Demo
  5. 03:03Windage Challenge
  6. 04:42Market Positioning & Value
  7. 05:34Technical Limitations

Frequently Asked Questions

How does the Sig Sierra 3 BDX smart scope work?

The Sig Sierra 3 BDX uses Bluetooth to connect a Kilo rangefinder to the scope. When you range a target, the rangefinder sends data to the scope, which then illuminates the correct red dot on the reticle for the calculated elevation holdover.

What ballistic data is needed for the Sig BDX system?

For accurate performance, the Sig BDX system requires precise ballistic data input into the companion app. This includes the bullet's muzzle velocity, ballistic coefficient (BC), and the scope's height above the rifle bore.

Does the Sig Sierra 3 BDX calculate windage holdovers automatically?

No, the Sig Sierra 3 BDX system automates elevation holdovers based on range. However, the shooter must manually input wind speed and direction into the BDX app to get accurate windage holdover dots.

What are the main limitations of the Sig Sierra 3 BDX?

Key limitations include its fixed parallax setting, which can affect accuracy at different distances, and the placement of the windage dot on the horizontal stadia line, which some find less intuitive than other methods.

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