I don’t know how you are getting plutonium from t_missile. t_missile can’t be deconstructed as shown below. I also don’t know how to hit it hard enough to break it without detonating it.
{
"type" : "terrain",
"id" : "t_missile",
"name": "missile",
"symbol": "#",
"color": "ltblue",
"move_cost": 0,
"flags": ["NOITEM"],
"bash": {
"str_min": 50, "str_max": 400,
"explosive" : 100,
"sound": "metal screeching",
"sound_fail": "clang!",
"ter_set": "t_missile_exploded",
"items": [
{ "item": "scrap", "count": [4, 8] },
{ "item": "plut_cell", "charges": [0, 3] }
]
}
Another good source of plutonium it turns out is mininukes. I got 40+ as a rare lab end. However each takes 6 hours to deconstruct.