Yes, early cordite contained more nitroglycerine, but it was still nitrocellulose-based for one very important reason...
You can have an all nitrocellulose powder, but you can't have an all nitroglycerine powder.
You MUST have nitrocellulose. It modifies the explosive rate of the nitroglycerine into a burn rate suitable for use in firearms.
Some of the other very early US smokeless powders also had very high nitroglycerine content, many of which went by the wayside even before World War I.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.