I've noticed that the damage numbers for guns on the wiki are either incomplete or haven't been updated since the gun buff last year. I figure it's high time we fixed that, no?
EDIT: I just discovered that Zeddy fixed a lot of the numbers recently, so...seems I've jumped the gun a bit. Oops. Still, the work isn't complete, so there's still stuff to do.
I've set out the damage numbers for most 5* guns in a guild hall training hall, tier 3 section, to give an idea of the relative power of each gun. Except polaris, because I am silly and forgot about that one. Anyways, looking at Zeddy's numbers, the T3 Training Hall seems to simulate damage on depth 23 - it's just shy of the lower damage numbers for stratum 6.
Weapon - weak normal/charge, neutral normal/charge, strong normal/charge. I'll be glossing over status effects like poison because I'm still trying to figure out how the hell they work.
All 5* guns, all heated to level 10.
Valiance - 107/336
Volcanic Pepperbox - 45/103 (per bullet)
Plague Needle - 17/29, 45/103, 96/188 (per needle, poison did REALLY screwy things with the damage numbers, needs more testing)
Blitz Needle - 21/37, 61/167, 110/229 (per needle)
Iron Slug - 148/336
Callahan - 35/64, 148/336, 209/397
Neutralizer - 92/366 (charge is per thing hit in the explosion)
Biohazard - 28/64, 92/336, 159/408 (charge is per thing hit in the explosion)
Supernova - normal shot at close range 92, at long range 148, charge shot 306
AP/Sentenza - 21/21-37, 61/61-167, 110/110-229 (first charge number is the normal shots, second is the bird)
Status Alchemers - 28/50, 92/252, 159/313 (ricochets do normal damage, didn't test status damage)
Umbra/Nova Drivers - 32/62, 130/306, 191/368
As for stuff on the wiki, Valiance needs an upper limit for it's normal shot on stratum 6.
Volcanic Pepperbox needs fire damage for tier 3.
The elemental alchemers need near enough everything.
Umbra/Nova need neutral damage in tier 2 fleshing out.
And...that's it.
...I feel really silly now. Next time, I check to see if anyone's updated the wiki before I make a fuss about it.
http://forums.spiralknights.com/en/node/75702
Oh, and either your Biohazard or your Neutralizer numbers is wrong. Neutra's charges are stronger.