Subsonic 308 Ammo: How Quiet is it?

Published on January 4, 2019
Duration: 7:04

This video tests the sound suppression of subsonic .308 Winchester ammunition compared to standard factory loads. Subsonic rounds, particularly handloads with 175gr match bullets, are significantly quieter, approaching airgun levels, though some variance suggests occasional near-supersonic performance. Standard supersonic rounds, while still hearing-safe with a suppressor, produce a distinct audible crack. The test also highlights the ballistic challenges of subsonic rounds at longer ranges (200 yards) due to significant drop, contrasting with the flatter trajectory of standard loads.

Quick Summary

Subsonic .308 ammunition with a suppressor is remarkably quiet, often sounding like an airgun. While standard supersonic rounds still crack audibly, subsonic rounds offer a significantly muted report. However, subsonic rounds experience substantial bullet drop at 200 yards, unlike standard loads.

Chapters

  1. 00:00Intro: Subsonic .308 Test Setup
  2. 01:09Subsonic Shooting at 100 Yards
  3. 02:02Supersonic Comparison at 100 Yards
  4. 03:22Subsonic Testing at 200 Yards
  5. 05:17Supersonic Performance at 200 Yards
  6. 06:18Conclusion: Subsonic .308 Viability

Frequently Asked Questions

How quiet is subsonic .308 ammunition with a suppressor?

Subsonic .308 ammunition, especially handloads with 175-grain match bullets and Trail Boss powder, is extremely quiet when suppressed, often compared to the sound of an airgun. However, some rounds might occasionally approach supersonic speeds, causing minor sound variations.

What is the difference between subsonic and supersonic .308 rounds at 100 yards?

At 100 yards with a suppressor, subsonic .308 rounds are significantly quieter, lacking the distinct 'crack' of supersonic rounds. While both are hearing-safe, the subsonic rounds offer a much more muted sound signature.

How does subsonic .308 perform at 200 yards compared to standard loads?

Subsonic .308 rounds face considerable bullet drop at 200 yards, making accurate hits challenging without precise ballistic data. Standard supersonic rounds offer a flatter trajectory and more consistent accuracy at this distance.

What components were used for the subsonic .308 handloads?

The subsonic .308 handloads tested featured 175-grain match bullets and Trail Boss powder. These were fired from a Ruger American Predator rifle equipped with a SilencerCo Omega suppressor.

Related News

All News →

More Reviews Videos You Might Like

More from KeystoneCarry

View all →