Reloading Mk 262 Mod 0 loads: Long Range .223 Fodder

Published on May 10, 2009
Duration: 5:05

This guide details the process of hand-loading Mk 262 Mod 0 type .223/5.56mm cartridges, a task requiring advanced reloading skills. Expert Nutnfancy demonstrates precise techniques for case preparation, powder charging using an RCBS ChargeMaster 1500, and achieving consistent overall cartridge length (OAL) with Sierra 77gr MatchKing bullets and Ramshot TAC powder. The emphasis is on meticulous load data tracking and labeling for optimal long-range accuracy, particularly for 600-yard targets.

Quick Summary

Expert Nutnfancy demonstrates reloading Mk 262 Mod 0 type .223/5.56mm cartridges using 77gr Sierra MatchKing HPBT bullets and Ramshot TAC powder. Essential equipment includes the Dillon XL650 press and RCBS ChargeMaster 1500 for precise powder charges. Meticulous load data tracking and labeling are crucial for achieving consistent long-range accuracy, targeting 600-yard shots.

Chapters

  1. 00:00Introduction and Reloading Setup
  2. 00:25Project Overview: Mk 262 Mod 0 Loads
  3. 00:48Bullet Selection: Sierra MatchKing 77gr HPBT
  4. 01:05Case Preparation: Trimming and Measurement
  5. 01:40Powder Measurement with RCBS ChargeMaster 1500
  6. 02:10Load Data Tracking and Labeling
  7. 03:10Powder Choice: Ramshot TAC and Testing Plans
  8. 04:00Long-Range Goals and Equipment
  9. 04:40Conclusion and Future Footage

Frequently Asked Questions

What are the key components for reloading Mk 262 Mod 0 type .223/5.56mm ammunition?

For Mk 262 Mod 0 type loads, you'll need 77gr Sierra MatchKing HPBT bullets (9377), Ramshot TAC rifle powder, and Remington primers. Cases should be trimmed to 1.75 inches and loaded to an OAL of 2.26 inches. Ensure your barrel has a 7"-9" twist rate for optimal bullet stabilization.

What equipment is essential for precise reloading of long-range cartridges?

Essential equipment includes a progressive press like the Dillon Precision XL650 for case processing, a digital caliper for precise measurements, a case trimmer for consistent case length, and an electronic powder dispenser/scale such as the RCBS ChargeMaster 1500 for accurate powder charges.

How does Nutnfancy ensure consistency and prevent errors in his handloads?

Nutnfancy meticulously tracks all load data in a notebook, using color-coded labels on bagged rounds. This detailed labeling prevents mix-ups and ensures that specific powder charges and configurations are correctly identified and used, crucial for load development and safety.

What is the recommended twist rate for Sierra MatchKing 77gr HPBT bullets?

The Sierra MatchKing 77gr HPBT bullets (9377) are recommended for barrels with a twist rate between 7 and 9 inches. This twist rate is necessary to stabilize the heavier bullet effectively at various velocities and distances, ensuring accuracy.

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