300 BLK - 190gr Hornady SUB-X with N120 and 1680

Published on May 9, 2022
Duration: 29:47

This video details the reloading process for 300 Blackout subsonic ammunition, focusing on the 190gr Hornady SUB-X bullet with Vihtavuori N120 and Accurate 1680 powders. It includes comprehensive testing of velocity, stability, and terminal ballistics through ballistic gel, comparing results against Nosler 220gr Ballistic Tip and Hornady 220gr ELD-X. The SUB-X demonstrated reliable expansion at subsonic velocities, while other tested bullets showed instability or fragmentation.

Quick Summary

The 190gr Hornady SUB-X bullet reliably expands in ballistic gel at subsonic velocities (974-1050 fps) due to its Flex Tip. Reloading with Vihtavuori N120 yielded exceptional 0.32" accuracy at 50 yards, while Accurate 1680 produced a 0.70" group.

Chapters

  1. 00:00Introduction: 300 BLK Load Testing
  2. 02:13Case Prep & OAL for SUB-X
  3. 05:49Powder Charging & Bullet Seating
  4. 11:03Range Test: Velocity & Stability
  5. 15:47Ballistic Gel Expansion Testing
  6. 18:09Gel Results Comparison
  7. 21:3450 Yard Accuracy Results

Frequently Asked Questions

What are the best powders for reloading 300 BLK subsonic ammunition with heavy bullets like the 190gr Hornady SUB-X?

For 300 BLK subsonic loads with heavy bullets like the 190gr Hornady SUB-X, Vihtavuori N120 and Accurate 1680 are excellent choices. Both powders provide consistent results and allow for safe loading at subsonic velocities.

How does the Hornady 190gr SUB-X perform in ballistic gel at subsonic speeds?

The 190gr Hornady SUB-X expands reliably in 20% ballistic gel even at subsonic velocities around 974-1050 fps. Its Flex Tip technology aids in initiating expansion at lower speeds.

What accuracy can be expected when reloading 300 BLK subsonic rounds?

Exceptional accuracy is achievable; the 190gr Hornady SUB-X with Vihtavuori N120 powder produced a 0.32-inch group at 50 yards. Using Accurate 1680 yielded a 0.70-inch group with the same bullet.

What is the recommended OAL for reloading 300 Blackout with 190gr Hornady SUB-X bullets?

For the 190gr Hornady SUB-X bullet in 300 Blackout, an Overall Length (OAL) of 2.070 inches was determined to be optimal for ensuring proper chamber fit and reliable magazine feeding.

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