Mk262 Cloning - pt 6 - BL-C(2) and TAC

Published on October 4, 2017
Duration: 28:31

This guide details the process of cloning the Mk262 Mod 1 load using BL-C(2) and TAC powders, as demonstrated by Johnny's Reloading Bench. It covers bullet and primer selection, powder handling, critical pressure considerations due to a shorter OAL, and range testing for velocity and accuracy. The expert instruction highlights the importance of meticulous load development and data analysis.

Quick Summary

Cloning Mk262 Mod 1 ammunition involves using 77gr Sierra MatchKing bullets and ball powders like Hodgdon BL-C(2) or Ramshot TAC. Key considerations include primer selection (CCI No. 41 vs. Remington 7 1/2), achieving target velocities (2750-2760 fps), and managing increased pressure due to a shorter OAL (2.246").

Chapters

  1. 00:00Introduction to Mk262 Cloning Part 6
  2. 01:14Powder Selection: BL-C(2) and TAC
  3. 02:02Bullet and Primer Variables
  4. 04:44Load Data and Pressure Considerations
  5. 09:04Reloading Process and Equipment Failure
  6. 11:24Range Testing: BL-C(2) Results
  7. 16:53Range Testing: Ramshot TAC Results
  8. 20:05Data Analysis and Primer Comparison
  9. 26:08Conclusion and Future Testing

Frequently Asked Questions

What powders are suitable for cloning Mk262 Mod 1 ammunition?

Hodgdon BL-C(2) and Ramshot TAC are ball powders tested for cloning Mk262 Mod 1 loads. Both can achieve target velocities around 2750-2760 fps with 77gr bullets, but careful load development is needed to balance velocity and accuracy while managing pressure.

What are the key components for a Mk262 clone load?

A Mk262 clone load typically uses 77gr Sierra MatchKing bullets (HPBT with cannelure), LC (Lake City) brass, and primers like CCI No. 41 or Remington 7 1/2. Ball powders such as BL-C(2) or TAC are commonly employed.

What are the pressure considerations when reloading Mk262 clone loads?

Reloading Mk262 clone loads with a shorter OAL (e.g., 2.246 inches) than standard can significantly increase chamber pressure. It's crucial to monitor for pressure signs like ejector smears and adjust powder charges accordingly.

How do CCI No. 41 and Remington 7 1/2 primers compare in Mk262 clone loads?

In testing with Ramshot TAC, CCI No. 41 primers showed a notable velocity increase of up to 37 fps compared to Remington 7 1/2 primers. This highlights how primer choice can impact ballistic performance.

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