Hornady 110gr projectiles - should be available from Henry at Budget as previous poster mentioned, also other stores.
Brass - bought some factory S&B from SFRC last year that reloads nicely.
.30 has some weird idiosyncrasies - headspaces off the mouth of the cartridge, so I had to add a Lee cartridge holder to trim with my Giraud trimmer, and case gauges don't tell you much as the case slips down into the gauge.
Love shooting my M1 Carbine though...