The type of propellant used is essentially meaningless. The same bullet propelled at the same velocity is going to have the same performance regardless as to whether it's black powder or modern smokeless. The only difference is going to be the cloud of smoke produced. I am not sure why one would list cordite as a "modern" powder as it hasn't been used for decades. Modern propellants are typically single, double or triple base composed of (respectively) nitrocellulose, nitrocellulose and nitroglycerine, and nitrocellulose, nitroglycerine and nitroguanidine. In actual performance, similar cartridges will have similar performance and unless you are using a lot of granularity, the difference between cartridges of the same class will be minor.