Temp stability test of some Alliant powders

Published on March 7, 2022
Duration: 9:20

This video details a comprehensive test methodology for evaluating the temperature stability of various Alliant rifle powders, including Reloder TS 15.5, AR-Comp, Power Pro Varmint, Power Pro 2000-MR, and Reloder 15. The expert instructor outlines the process of subjecting ammunition to extreme cold (32°F) and hot (100°F, 150°F) temperatures and measuring the resulting velocity variations. The findings highlight the superior temperature stability of powders like Reloder TS 15.5 and AR-Comp compared to traditional ball powders.

Quick Summary

Alliant Reloder TS 15.5 in .308 Win demonstrated superior temperature stability with only a 10 fps extreme velocity spread from cold to hot. AR-Comp in .308 Win also performed well with a 16 fps spread, confirming their marketing as temperature-stable powders.

Chapters

  1. 00:00Introduction to Powder Temperature Test
  2. 00:24Alliant Powders Selected for Test
  3. 00:44Calibers and Initial Velocity Spread Results
  4. 01:25AR-Comp and TS 15.5 Consistency
  5. 02:00Test Methodology and Future Changes
  6. 02:30Temperature Testing Setup
  7. 03:40Specific Load Data
  8. 04:00Future Primer Test Plans
  9. 04:46Detailed Powder Performance Analysis
  10. 06:00Reloder 15 Data Anomaly
  11. 07:40Refining Future Testing Methods

Frequently Asked Questions

Which Alliant powders were tested for temperature stability?

The video tested five Alliant powders: Power Pro Varmint, AR-Comp, Reloder 15, Reloder TS 15.5, and Power Pro 2000-MR. These included both ball and extruded powder types.

What were the results of the temperature stability test for Alliant powders?

Reloder TS 15.5 in .308 Win showed the best stability (10 fps spread), followed by AR-Comp in .308 Win (16 fps). Power Pro 2000-MR in .223 Rem had the worst stability with a 148 fps spread.

How was the temperature stability test conducted?

Ammunition was exposed to cold (32°F) and hot (100°F, 150°F) temperatures overnight. Velocity was then measured using a chronograph to determine the extreme spread of average velocities.

Are Alliant AR-Comp and Reloder TS 15.5 powders temperature stable?

Yes, AR-Comp and Reloder TS 15.5 are marketed as temperature stable, and the test results confirm this, showing minimal velocity variation across temperature extremes compared to other tested powders.

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