Cloning Mk262 - Winchester 748 & 760
This video details an attempt to clone Mk262 ammunition using Winchester 748 and Winchester 760 powders with 77-grain Sierra MatchKing bullets. The instructor, with experience in this series, tests various powder charges, meticulously recording velocity, group sizes, and pressure signs. While Winchester 748 proved ineffective for accuracy, Winchester 760 showed significant promise, particularly at lower charge weights, warranting further investigation.







![Gotta reload to keep shooting [Compilation PART 127]](https://i.ytimg.com/vi/XFK65uDs5BA/hqdefault.jpg)



