Is It Accurate? .308 Subsonic Precision Rifle

Published on October 15, 2022
Duration: 8:18

This video tests the accuracy of Atomic .308 subsonic ammunition (175gr HPBT) from a factory Sig Sauer Cross rifle with a Dead Air Sandman-K suppressor. At 50 yards, the rifle achieved a 0.3-inch group (approx. 0.5 MOA), demonstrating impressive precision. However, at 100 yards, the group expanded to around 2 inches with a significant drop, potentially due to optic limitations like parallax and a fixed reticle not optimized for subsonic .308. The instructor plans a follow-up test with a dedicated precision rifle scope.

Quick Summary

Atomic .308 subsonic ammunition (175gr HPBT) demonstrated excellent accuracy at 50 yards, achieving a 0.3-inch group (approx. 0.5 MOA) from a Sig Sauer Cross rifle. At 100 yards, the group expanded to about 2 inches with a 5-6 inch drop, with optic limitations potentially influencing results.

Chapters

  1. 00:30Intro and Goal
  2. 00:51.308 Subsonic Ammunition Details
  3. 01:58Rifle and Setup
  4. 02:4350 Yard Test Results
  5. 03:1250 Yard Group Measurement
  6. 03:30100 Yard Setup and Expectations
  7. 04:12100 Yard Test Firing
  8. 05:09100 Yard Group Assessment
  9. 05:36Potential Optic Issues
  10. 05:53Inconclusive Findings & Future Plans
  11. 07:24Summary of Results

Frequently Asked Questions

How accurate is .308 subsonic ammunition at 50 yards?

In this test, Atomic .308 subsonic ammunition (175gr HPBT) achieved an impressive 0.3-inch group at 50 yards, which is approximately 0.5 MOA. This indicates very high precision for subsonic rounds at this shorter distance.

What was the accuracy of .308 subsonic ammunition at 100 yards?

At 100 yards, the .308 subsonic ammunition produced an estimated 2-inch group. The rounds also experienced a significant drop of about 5-6 inches, as predicted for subsonic velocities.

What rifle and accessories were used for the .308 subsonic test?

The test utilized a factory Sig Sauer Cross bolt-action rifle in .308, fitted with a Dead Air Sandman-K suppressor, an Atlas bipod, and a Bushnell 1-8x low power variable optic.

What factors might have affected the 100-yard accuracy of the .308 subsonic rounds?

Potential factors include the optic's fixed parallax setting and a reticle calibrated for .223, which may not be ideal for precise aiming with subsonic .308 at 100 yards. The instructor plans to retest with a dedicated precision rifle scope.

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