The steel loads serious waterfowlers depend on has been driven to new heights of performance. Remington Nitro-Steel High Velocity Ammunition. Now with additional hard-hitting, higher velocity offerings. Premier, zinc-plated, 100% round pellets fly straight, delivering true close to long-range pattern performance. And NITRO-STEEL is fully compatible with aftermarket ported and wad-stripping chokes. It's a proprietary blend of components that produces more dead birds than any other load, year after year.