This dupe method is suitable for both server games and the local Minecraft network. To successfully perform this trick, you will need certain items and a little skill.:

- Two chests (to create one large chest).
- One dynamite.
- Ignition (lighter).

Follow these steps to complete the dup: 

1. Place two chests next to each other so that they form one large chest.
2. Transfer all the items you want to duplicate to this large chest.
3. Place the dynamite on the ground at some distance from the chest.
4. Hold down the dynamite and at the same time quickly press the key to which your macro is attached. Make sure that repeated keystroke is set in the settings.

After completing these steps, you will be kicked out of the game. When you come back in, check if there has been a dynamite explosion. If it did not explode, it means that the dup was successful, and your items were successfully duplicated. 

However, if the dynamite has already gone off, it means that the server has saved the data, and you will need to repeat the process again. 

Pay attention to the important delay settings between keystrokes, as this is critically important if you are playing on a server. Recommended delay values:

- 52 ms (if the Internet speed is 200 Mbit/s)
- 61 ms (at speeds from 200 to 400 Mbit/s)
- 65 ms (at speeds from 400 to 1000 Mbit/s)

To find out your internet speed, use websites such as Speedtest. Good luck in the game and successful dupes!