Ok, i now have decent taste of what the magnus lines can do (got mega tundrus and mega magnus at lvl 10). Devastating is the only word that comes to mind. I'm ditching my antigua guns for these babies.
With that in mind I'm planning to upgrade my mega magnus to Callahan to give me an advantage against those annoying beasts and fiends but i'm a bit hesitant...
You see i've use my mega tundrus/magnus on these guys and they always dodge my charge attacks so i use my normal attacks on them instead.
my question is how does callahan fair against these annoying critters? and how do you use it to great effect? Charge attack or normal attack.
The charge projectile is definitely slower than the regular projectile. If you wait for your target to initiate its attack sequence, then you can use the charge attack, which rips through them. But if the monsters are all in different stages of their AI sequence, then a bunch will dodge, so you will miss them.
If you use regular attacks, then stun happens fairly often, but the damage might not be great. I haven't recomputed it since the gunner update.
Although you didn't ask exactly this question, there is one weapon that is good at clearing fiends safely and great at clearing beasts quickly: Dark Briar Barrage.