I just ordered 300 408 CT directly from CT, these were supposed to be shipped on the 21st. Rep stated the brass was made on new tooling, he said they had plenty. Im not familiar with the brass you asked about.
I just recieved the 408 brass from Chey Tac. It is marked Jamison and looks to be of good quality. The only thing I noticed was that it looked like it had been run through a sizing die. Reps from Jamison said this was normal, anyway I am happy to have it.
I have used Bertarm for some time now and like it alot. Also I can get it most any time from Keary at Page 1 . If you need some help getting some email me and I'll see what I can do. firstname.lastname@example.org