What is the purpose of cleaning a firearm from the breech end?

Cleaning a firearm from the breech end serves the essential purpose of preventing damage to the muzzle crown. The crown is the very end of the muzzle, and it is critical for ensuring accurate shot placement. If cleaning is done from the muzzle end, the cleaning rod or brush can potentially strike the crown, causing dents or other damage that can adversely affect the firearm's performance and accuracy.

By starting the cleaning process from the breech, the rod or brush is directed toward the muzzle, avoiding any impact with the crown. This approach not only protects the integrity of the barrel but also helps maintain the firearm's overall accuracy over time.