There is currently no pure piercing gun that is able to effectively catch up to those monsters. For some reason, OOO decided that, even though the monsters weak to piercing all dodge a lot and move quickly, all the pure piercing guns would be heavy guns. Heavy guns means that they begin firing slowly, don't allow you to move while firing, and tend to deal more damage.

The Needle Shot has fast projectiles that go in a fairly tight spread. The distance on those shots is reasonable, but in the time it takes for you to finish firing all 6 shots in a normal attack pattern 99% of wolvers and devilites will have dodged away after only getting hit once or twice. The charge shot on this is actually pretty useful now that it causes the monsters to fall down. The charge shot can be used against these monsters since it blocks their dodging, but you're stationary for a pretty long time with the charge and you will probably take some damage if you're facing a large group.

The Callahan has slow projectiles that don't go very far (normal shots). These have the benefit of knocking the monsters back when they hit, but I've only seen that work well on T2 wolvers. T3 wolvers will almost always dodge the shot. Devilites recover from the knockback too quickly for you to fire another shot so that advantage is useless on them. The thing about the Callahan though is its charge shot. The Callahan's charge has the most range of any gun in the game. If there's enough room and you can mark the position of the monsters you're firing at, you can snipe from so far away that they won't react to your bullets. However, the charge shot doesn't move all that fast, and you can't really do that unless the monsters are above you so it's not too useful.

That was all the objective data, now here's my opinion:

Notice that I haven't talked about gremlins yet. Gremlins are best handled (in my experience) with a Sentaza. They take full damage from that gun, and since they only dodge backwards you're able to effectively pin them in a corner with it. This has helped my team out numerous times in deconstruction zones. When a gate pops open, just open fire and most if not all of the gremlins will stay in the room allowing your team to go in for the kill. Gremlins are by far, the easiest dodging monster to handle with a gun.

For devilites, I find that the needle shot gets you killed. It just takes too long to fire, and since the devilites have projectiles of their own you need to keep moving. The Callahan will allow you more mobility than the needle shot (although not that much more), but you will survive better with it against devilites. The Needle Shot also tends to make the devilites dodge like crazy even after you finish firing. It seems like they dodge 6 times in a row after you start shooting the thing. Not cool for your team or for you.

For wolvers, I haven't found a gun that will kill them effectively. T3 wolvers are just too much. Every single one of them does teleport dodging like that one big one that you run into sometimes on T2. It's horrible for your team and for you to try to attack those things. Your team can't hit them, you can't hit them, and sometimes you cause one to do a teleport attack (they attack right after they teleport behind someone). If you have only guns and you face a pack of wolvers in T3 with a team of swordsmen, just hang in the back and don't fire. Don't even fire when they bark b/c even though you're hitting that one, you're making all the rest of them dodge and creating hell for your swordsmen. For wolvers, I suggest the Final Flourish (which coincidentally works well against devilites too!) :P.

Devilites do that multi-dodge maneuver as one of their predetermined behaviors regardless of which gun you use. You have to wait till they stop before you can attack them.

T3 Wolvers will teleport whether or not you shoot a gun. When you shoot a gun, they teleport towards the shooter. Just because you shoot a gun doesn't mean all of them will teleport. They only respond within a very specific range of the shooter. In a party, you can lure one or two Wolvers away from the rest if you fire a shot from a distance. That way, you can deal with them by yourself while the rest of the party concentrates on the rest. If you are soloing, the best tactic is to shoot and move, making sure you always have an escape route.

The Magnus's projectiles go faster than dodging monsters can react. You can even knock down a wolver and keep it down by shooting it repeatedly. The Magnus series might as well be referred to the Wolver Annihilator series.

So, yeah. Go with Callahan.

From my experience with Magnus line it also helps to have autoaim enabled, without it i usually miss my hits even if i would hit in that case with Valiance. I also have shift bound for autoaim so i just hold it when sniping silkwings for the times when i actually use my Mega Magnus.

I don't know about you guys but... my polaris totally DESTROYS devilites in T3.

Just to add to the discussion...

I've taken out entire T3 Gremlin/Wolver danger rooms with just a Mega Magnus. Takes a long time but it definitely hits/stuns them. The bullet will hit a wolver before it teleports. It might still teleport, but only after taking damage. Autoaim is practically necessary with this line of guns since the hitbox seems to be very narrow (good for sniping Silkwings, but annoying if you are firing madly.)

It works on T3 Devilites and Grevers, but I find it too dangerous for my liking. Much prefer the Flourish series for dealing with Fiends. Obviously not an option for a pure gunner though.

However, that video was shot at depth 19 which is right outside of the terminal. Notice also how much the other wolvers dodge. Even if the dodging is controlled, being a swordsman and trying to run after a wolver that's dodging because a gunner's firing near it is not fun. In a group situation it's best to not fire a gun on a pack of wolvers unless you're well outside their sensory range, and even then what's the point of killing 1 wolver with your gun.

I did mention in my previous post that the magnus worked fine on T2 wolvers. You can somewhat predict T2 wolver's dodging pattern when you back them up near a wall so it's not too hard to get them to fall down. It's the T3 wolvers that give gunners trouble.

Short answer for wolvers and devilites: use a sword (flourish works well).

It's totally clear wich weapon you have to use... It seems many here don't understand how the Magnus Series works. Let's explain the whole thing: Wolver and Devilites have an very smart ability to dodge most of all bullets or other kind of shots. They allways will dodge every projectiles. The Magnus doesn't shot any projectiles. It's just an animation followed by an explosion. Wolver and Devilites nerver ever will dodge these "shots". Now comes the part that most players is confusing. If you would miss with your not well aimed shot, they will do the "Dodge" Animation. For example Devilites will jump around and Wolver will burrow. A good gunner must not activate auto aim! It's very important, cause you'll miss more with that crap. Also when activated you will be unable to snipe important units like healers. Against any kind of healer use the Magnus, cause it will stunlock the enemy (permamently falling back).
Against Gremlin the Toxic Catalyzer is the best allround choice. It's also awesome against Slime, way better than the alchemer crap! ... aslong you use it wisely.

@GodisPie if you wanna demonstration, Abathur is online ;) ... yea it's me -.-''

You know, I recently picked up the Needle line. I find if you back up to a corner and build up a charge, they will don't dodge back into the spray. And even when I'm not against a corner, all I do is shoot at them, and when they dodge, shoot behind me (speaking for T3 wolvers).

Personally I use the sentenza, but I'm sure the Argent Peacemaker will work as well. Wolvers on teir 3 are weak to it. THe trick is to fire one shot and then the rest at where the wolvers are going. Its not to hard to predict since a red circle pops up before they do. Once you hit them with a couple shots it usually causes them to flop on their bellies. Then switch to sword real quick and hack them till they're dead. Repeat as neccessary. I don't care what others say, I have found this tactic most efficient in that I can survive a tier 3 wolver den on my own. Also firing at them is not only a great way to draw them to you but also to make them teleport away.