I'd say a stamping press is pretty specialized. You find very few of them in home shops, but I'd like to hear how you plan to make smokeless powder and the lead styphanate for the primers.
A high-volume stamping press is specialized.
A hydraulic 50+ ton press isn’t.
Making smokeless powder isn’t difficult. Start by making gun cotton. Sure, you’re going to have to experiment to get the correct burning rate. But making propellant isn’t as difficult as people think. Making propellants with varying rates of burn - that’s more difficult, but making propellants that could propel a rifle bullet are hardly impossible to make.
As for the priming compound: Yea, it’s corrosive, but fulminate of mercury is easy to make as a starting point. It worked just fine 100 years ago, it would work OK today.
Too many people think this stuff is impossible. It *isn’t*. It just requires getting back into a shop and thinking how our grandfathers did this stuff.