Good call, might as well use lead too.
Actually most post offices don't carry them anymore in my area or at least start with short supply. Your neighborhood sporting good department is the place to go.
Boy I wouldn't even think about hunting without the federal stamp. Walmart,Academy, dicks all have them and online at the wildlifedepartment.com
Ive seen the Feds patrolling lake thunderbird before. That would be a bad encounter without the Fed stamp.
That was a joke......but I haven't duck hunted in 20 years. And I haven't had to buy a license or stamp in about that same length of time...pretty annoying spending 2+ hours driving around trying to get a stamp.