Travel through a and back multiple times, or move far enough away to unload the chunks where the hoppers are located.
If timed correctly, the item will drop twice. This was common enough that many players used macros to hit the perfect window. 4. Modded Minecraft Dupes (Feed The Beast / Technic)
The most effective duplication methods for range from simple save-file manipulation to complex redstone timing and chunk boundary exploits. 1. The Alt+F4 Save & Quit Method (Single Player) minecraft 1710 dupe work
Press the button and just as the piston head extends.
Minecraft version 1.7.10 is a legendary era for the game, still widely played today due to its massive modding scene. Because it was the final release before the major 1.8 update, many of its glitches remained unpatched for years. Travel through a and back multiple times, or
At least two of the item you want to duplicate. The Process: Drop the items you want to duplicate on the ground. Press Escape and select "Save and Quit to Title" . Re-enter the world and pick the items back up. Immediately press Alt + F4 to force-close the game.
Placing this setup on (especially corners) increases success, as different chunks load and unload at slightly different times. The Alt+F4 Save & Quit Method (Single Player)
On most servers, duplication is a bannable offense . Many modern 1.7.10 servers use plugins like Spigot or Paper that fix these "vanilla" bugs automatically.
A classic method that worked throughout the 1.7 cycle involves breaking an item frame at the exact moment it is moved by a piston.
When you restart the game and load the world, the items should be in your inventory (from the save) and also lying on the ground (since the world file didn't save their removal). 2. Hopper Chunk-Loading Glitch (Vanilla & Multiplayer)