Keep checking with Starline . As their rotation gos around the brass sell pretty quick some times.
As for buying components before the rifle.
That is exactly what I started doing when ordered my 45-90
I already had the primers well before Bush left office and I have gathered up 16# of 3031 and 450 cases. I just need a couple of slug molds the sizer die and most important the RIFLE.
Good luck finding the brass you are looking for.
