Didn't think of the higher tier ammo types, looks like piercing is only behind Green science. So Much more plausible but definitely a 'rush from the start' kind of strategy required.
The tree problem is an interesting one, I think if it was limited to finite items (not science and ammo requirements) then it would be fine. Just felt quite odd seeing the logic clearly try and give me turrets early but no way to use them without hand mining and on a finite count. Getting to Vulcanus/green-science/blue-science with only say, a few dozen oil refineries would be very reasonable, could get there with 1 if needed. Bullets burn up so fast its hard to know what enough will be. I had about 600 easily available, which isn't a lot in terms of bullets on a desert map.
So restarting on a forest seed in stealth mode this seed might totally work out, or restarting and rushing piercing ammo production, just wasn't sure if that was an expected technique the randomizer was meant to invoke. Sounds like it is, so cheers :)