Is about to start my barrel - as soon as I call and pay!
They have the reamers for the .25 Krag AI 40degree chamber. If you are looking for a quarter bore in a single shot and want a rimmed cartridge - this is the one I chose. I picked up a set of RCBS dies on close out, but I'm sure Dave at CH4D lists this as one of the cartridges he makes dies for as well. They will be keeping the reamers.
As for size - it is two grains of water larger than the 25 Roberts AI and two grains of water smaller than the 25-06. Seems to me relatively easy to come up with loads for it given how it falls directly between those two, and I have data for both (old Sierra manual for the 25 Roberts AI.)