The real requirement is 200 .44 JHP, 50 10mm JHP, 200 .12 Gauge shotshells.
That will be under 50 Gunpowders and only 5 metal parts.
~55 junk also needed, iirc.
Also remember: you lose your stuff on exit, and anything in containers will disappear when the random loot refreshes.
Just carry what you need and drop the rest on ground for others.