Just a few size comparison photos I threw together. 50 rounds of .50 BMG, .308, and .223. It really shows the difference. All are effective in their own environments, but just something about the .50 BMG cartridge that stands out. The case they are in is a MTM 100 round 12 Gauge Shotshell box. It comes with 2, 50 round trays. I removed the top one and use it for a loading block, and with the other one at the bottom, it makes a great 50 round transporter for the .50 BMG. Bill T.