In the event that the contrarian element of our society succeeds in maintaining a dominant role within our government, succeeds in its unswerving assault against the periodic table, and lead remains permanently off the menu; there are still ways to make less desirable replacements work.
I do agree with that 100% and I agree their are other options, many of which you cite. What will definitely change in that situation will be the manufacturing costs. From the engineering of new equipment to developing the process, there is a cost and a substantial one.
For the most part, shooting is becoming a sport for the rich. From the cost of quality guns to quality optics, many that are struggling financially find our hobby to be excessively expensive. I see it when I go to the range, someone shows up with a 20 round box of ammo and leaves.
I think there will come a point where the average Joe simply will not be able to participate with anything other than a small caliber rifle. Wages are certainly not going up, but prices are. One good thing about lead is, it is cheap. Another good thing is, it is easy to manipulate into whatever it is you want to make with it. It does help to keep our hobby affordable. Most guys can not afford to go to the range and shoot 100 Barnes down range because the increased cost of an all copper projectile, let alone one with a sintered core, which definitely would cost more than a simple lead one.
Everything else you cite is also spot on, in the event of a war our country can no longer manufacture one of the basic components to fight in it with from the raw ore to the finished product. That is pure ignorance on our governments part.
I think what really offends most people about this closure is not only the potential of what it could do to shooting, it is also what it can do to our national security. The nay sayers are just so used to ordering crap from China and they don't see this as a big deal, but the folks with any common sense and those who understand the importance of self-sufficiency are the folks that are up-in-arms over this nonsense.
Focusing on today and not focusing on tomorrow is the single greatest reason we see our country going to shit. It is all about now and many of us know how fast what is happening now can change. If we fail to consider every reasonable and potential situation of significance in our planning we limit our options when things we take for granted simply no longer exist.
Mining, manufacturing, and energy production are three of the most important things that can ensure the survival of our economy and our country.
When we become dependent on others, we loose our sovereignty. I personally am not thrilled with the idea of living in a country that answers to another but there are a lot of people in this forum that obviously are... just buy it from Mexico... just buy it from China... Fuck that. Make it HERE!