No step - definitely brass. Below is from their website - they tout everything as American-made and seem pretty proud of the company and their products. Home Page - Ammo Inc.
"AMMO, Inc. is a high-quality, technology-driven ammunition U.S.-based company; from our patented STREAK (R), HyperClean, and military ammunition technologies, to the latest and best manufacturing technology in the industry. Our manufacturing facilities and processes meet or exceed all SAAMI and MilSpec specifications.
We pride ourselves in our strong American heritage. We use the best American-made components and manufacture our products in the United States. Each round is designed, manufactured, inspected and packaged to bring a superior shooting experience to our end user.
Every AMMO, Inc. round is meticulously inspected by U.S. citizens. As a company, we are focused on creating jobs for Americans. The ammunition we build performs like high-end custom, hand-loaded ammunition, but is sold at extremely competitive prices."