Yes that would be repeatable but the chargemaster can't do that. They have a resolution to the tenth of a grain +\-.
I have rigged up a 5-0-5 beam scale so it can repeat charges to +\- a single kernel of powder, much more repeatable.
This video is pretty short and sort of illustrates what I am talking about.
https://www.youtube.com/watch?v=JmxBSOOL7Ks
So the RCBS with that powder and +\- .1 grain equals a difference of up to 12 kernels, if that is your definition of "the same", they will work just fine.