I really hate 2 things in this game - that you lose LOTS of ammo against even petty raiders, so it's disadvantageous to have multiple ranged weapons at the shelter, and that the game allows you to defend with 1 bullet, so it's best if you take all ammo from your shelter but 1 WITH YOU on all scavenges or leave it stashed off-site - unless you have a truckload.

There are 4 levels of raids. Here's what I'd like to do and I'd like to know if it's possible:

Easy raid
"They didn't seem very determined...."
"They must've been more scared than us..."
"They were just a couple of scavengers..."
0 ammo used (it's only in the first few days of survival anyway and they would've been scared just by seeing firearms)

Moderate raid
"It was a band of hardened robbers..."
"They really meant business..."
"It were quite a tough group..."
1 or 2 bullets used (scared off by shooting)

As you know, right now it's 3 bullets per weapon per person used, so you can lose 9 bullets vs a moderate raid, which sucks and it's unrealistic.

Hard raid
"They were a tough and mean bunch..."
"They came in force and were armed..."
"The attackers were very aggressive...":
4 or 5 bullets used? Please leave suggestions based on the in-game descriptions.

Extreme raid
"They were an armed band of ruthless looters..."
"They had guns and were trying to kill us..."
"They were extremely aggressive and very well armed..."

At least 10 bullets used? Feel free to leave suggestions.