Peak 365 Build - Icarus | Norsso | Radian

Published on April 19, 2025
Duration: 35:15

This video details a comprehensive accuracy testing process for a custom Sig Sauer P365 build, focusing on selecting the optimal carry ammunition. Lead Firearms Instructor Roger Barrera demonstrates how different ammunition types and weights impact group sizes at 25 yards, emphasizing the importance of finding what a specific firearm 'likes' for maximum accuracy and reliability. The guide includes insights into recoil mitigation with the Radian Ramjet comp and the performance of the Vortex Defender CCW optic.

Quick Summary

For a custom Sig P365 build featuring an Icarus grip, Norsso slide, and Radian Ramjet comp, Atlanta Arms Elite 115 grain jacketed hollow points proved to be the most accurate ammunition, achieving a 7/8 inch group at 25 yards. This highlights the importance of testing different ammo types for optimal firearm performance.

Chapters

  1. 00:00Introduction: Custom P365 Build
  2. 01:00Product Transparency & Sponsorships
  3. 01:50First Shots & Initial Impressions
  4. 04:32Ammunition Testing Methodology
  5. 05:25Supervel Veil 115gr Grouping Analysis
  6. 06:59Speer Gold Dot 124gr Grouping Analysis
  7. 08:24Atlanta Arms Elite 115gr Grouping Analysis
  8. 11:30Winchester Ranger 147gr Grouping Analysis
  9. 15:29Final Ammunition Selection & Zero Confirmation
  10. 16:21Bill Drill from Concealment
  11. 21:49Doubles Drill: Tracking and Consistency
  12. 23:54Slow Motion Recoil Comparison (115gr, 124gr, 147gr)
  13. 26:13Final Carry Magazine & Ammo Grouping
  14. 29:15Final Thoughts & Build Review
  15. 33:25Bonus Footage: Cameraman's First Shots
  16. 34:09Bonus Footage: Intro Bill Drill Time

Frequently Asked Questions

What is the best ammunition for a custom Sig P365 build with an Icarus grip, Norsso slide, and Radian Ramjet comp?

Based on testing at 25 yards, Atlanta Arms Elite 115 grain jacketed hollow points provided the best accuracy, achieving a 7/8 inch group. Winchester Ranger 147gr was second best, followed by Supervel Veil 115gr +P and Speer Gold Dot 124gr.

How does the Radian Ramjet comp affect recoil on a Sig P365?

The Radian Ramjet 3.7-inch afterburner significantly mitigates recoil and muzzle flip, keeping the red dot within the optic window for faster follow-up shots and a flatter shooting experience. This allows the firearm to do much of the work for the shooter.

What are the key components of the custom Sig P365 build reviewed?

The build features an Icarus grip module, a Norsso slide, and the Radian Ramjet 3.7-inch afterburner system. It is topped with a Vortex Defender CCW optic and utilizes Sig P365 magazines with Radian base pads.

What is the recommended technique for testing firearm ammunition accuracy?

Test multiple brands and weights of ammunition at a consistent distance (e.g., 25 yards) using a bench rest. Fire five-round groups, measure them accurately, and compare results to find the ammunition that yields the tightest groups for your specific firearm.

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