Ammunition shortages and an inflation damaged economy have resulted in many new reloaders. As a sub-group of reloaders, bullet casters have also seen an uptick in new casters. Lots of these newbies still need to learn stuff that us old timers take for granted. Please remember "There are no stupid questions, only stupid people". When new guys ask things that make us do a face palm, it's up to us to share our knowledge and set them on the straight path.
As for exotic alloys, I have a really good alloy that I use as my basic rifle bullet allow, or cut 50/50 with pure lead for my pistol alloy. On the LASC website they have a good article on making casting alloys using Rotometals superhard. Here's the link: http://www.lasc.us/SuperHard.htm From that page I choose to make alloy #8, but with some slight modifications. First, I melt down some chilled shot and cast it into 1 pound ingots. I do this to get the trace amounts of arsenic that I want for my alloy. I substitute 1 pound of this "shot" alloy for 1 pound of the straight lead in the recipe. Also, I use tin from Rotometals, but I only use half the amount that's called for. I add lead free solder to make up the rest of the tin. I do this because the lead free solder contains a trace amount of copper, which toughens the alloy. I salvaged my lead from a counter-weight off a piece of broken machinery that was being scrapped, so I lucked out and got that for free. I'm posting this so that you can see, not everybody just hap-hazardously slaps together casting alloy from whatever happens to be around. Some of us put a lot of thought and effort into it.