Is there a certain calibre of gun that can damage the secure supply cashes.

I manage to get to opening 3 out of 6 secure supply cashes in the two facilities in the exploration sector. However, due to RnG (or not knowing a better way than using the average of min and max to cull as much range as fast as possible) I can never get past 3.

So I decided to bring my CV guns to bare on the door, but they deal no damage, I can understand why my sniper and other small arms didnt work, but really a ship cannon cannot breach a door!

So I am wondering, are these things breachable? or do they have plot armor of you failed the hack too bad.
Ive tried flak, cannon, and gattling. Once i get my new CV I will have artilery and could try that but at this point im not sure if anything can breach those damn doors.

In addition to this there is no access route to their cores, (or at least none that I found).

So just wondering if anyone knows, can you breach these doors with anything?