I have had some papers which tore rather haphazardly , so I like to double check the tear direction before making cartridges....just a habit. If you loose some powder, your shot may be affected.
When shooting this month's smoothbore match, my last shot was loaded with the full charge, but with the bare ball under the cartridge paper as a wad due to fouling. The result was the same as less powder ie lower velocity, so the shot hit low by 4 inches. Not a big deal when shooting for fun alone, but when hunting, I want all the accuracy I can get.