I am new to reloading and and just recently purchased everything to get into it. However I am having a hard time finding brass right now. I was looking to get Nosler or Norma but cannot seem to find it anywhere right now. What would be my next best option? Also I will be working up a load for a Remington 5r 300 win mag w/24" barrel. I plan on trying out the Berger 230gr Hybrid OTM and the 215 hybrid as well using H1000.