Dont look like its needed.
Yes, you can empty a blind magazine without fully chambering or cycling rounds through the bolt. By tipping the rifle slightly upward and pushing the bolt forward just enough to release a cartridge from the magazine lips, the round will pop out of the well. You can then retract the bolt and catch or remove the cartridge, repeating this process until the magazine is empty.
This method allows for safe unloading without locking the bolt back or forcing a round into the chamber, which is particularly useful for avoiding potential feeding issues or ensuring the rifle remains safe during the unloading process.