CZ 527 American 300 Blackout Review

Published on August 4, 2019
Duration: 11:21

This guide details the process of testing the accuracy of the CZ 527 American rifle in 300 Blackout, as demonstrated by Joel Wise. It covers setting up the rifle, using different ammunition types, measuring trigger pull weights with a Wheeler Trigger Pull Gauge, and analyzing shot groups at various distances. The review highlights the rifle's preference for subsonic ammunition for optimal accuracy.

Quick Summary

The CZ 527 American in 300 Blackout demonstrates superior accuracy with subsonic ammunition, achieving sub-MOA groups at 50 yards. Supersonic loads performed poorly at 100 yards, suggesting the rifle's 1:7 twist barrel is optimized for heavier subsonic projectiles. The set trigger offers a 1 lb pull, but the standard 3.5 lb trigger yielded better groups in testing.

Chapters

  1. 00:03Introduction to CZ 527 American 300 Blackout
  2. 00:14Review Overview and Testing Plan
  3. 00:31Set Trigger and Accuracy Test Plan
  4. 00:57Action and Barrel Details
  5. 01:25Stock, Weight, LOP, and Safety
  6. 01:56Magazine and Set Trigger Benefits
  7. 02:25Subsonic Ammo Test (Sellier & Bellot)
  8. 03:10Subsonic Ammo Test (Hornady Sub-X)
  9. 03:41Trigger Pull Weight Test Introduction
  10. 04:07Standard Trigger Pull Measurement
  11. 04:49Set Trigger Pull Measurement
  12. 05:32Trigger Pull Summary and Test Results (Standard)
  13. 06:20Trigger Pull Test Results (Set)
  14. 06:41Subsonic Trigger Test Conclusion
  15. 07:11Supersonic Ammo Test (Magtech)
  16. 07:51Supersonic Ammo Test (Magtech, Second Attempt)
  17. 08:27Supersonic Ammo Test (PNW Arms)
  18. 08:41Supersonic Ammo Test (PNW Arms, Results)
  19. 09:05Supersonic Test Conclusion & Paradox
  20. 09:33Subsonic Re-test at 100 Yards
  21. 10:26Final Accuracy Summary and Conclusion
  22. 10:39Outro and Sponsors

Frequently Asked Questions

What are the key accuracy findings for the CZ 527 American in 300 Blackout?

The CZ 527 American in 300 Blackout excels with subsonic ammunition, achieving sub-MOA groups at 50 yards. Supersonic loads showed poor accuracy at 100 yards, indicating the rifle is optimized for heavier subsonic projectiles due to its 1:7 twist rate.

How does the set trigger on the CZ 527 American perform?

The CZ 527 American features a set trigger that reduces pull weight from approximately 3.5 lbs to 1 lb. While lighter, the set trigger did not yield better accuracy than the standard trigger in testing, suggesting the standard configuration may be preferable for this rifle.

What ammunition types were tested with the CZ 527 American 300 Blackout?

The review tested Sellier & Bellot 200gr subsonic, Hornady 190gr Sub-X subsonic, Magtech supersonic, and PNW Arms 147gr FMJ supersonic ammunition. The rifle demonstrated a strong preference for the subsonic loads.

What are the main technical specifications of the CZ 527 American 300 Blackout?

The rifle features a Mini Mauser style bolt action, a 16.5-inch cold hammer-forged barrel with a 1:7 twist rate, a 5-round detachable magazine, and weighs under 6 pounds. It also includes a two-position safety and a set trigger mechanism.

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