I found about 150 rounds of brass in .223 that I forgot I had picked up at the range over the summer. This will go with about 200 rounds of what I have picked up from shooting the new AR. What do most of you consider to be the minimum that you'll buy for a new caliber? I'm just getting started on .45ACP and had thought 9mm was going to be next. I'll have to get a trimmer but that was in my future anyway. Also found about 50 rounds of .308 but I don't have a firearm in that caliber.