So, overframe doesn't show it in the stats, but there's also an alt-fire three grenade burst-fire mode that's freaking AWESOME and goes heavy on status. With one 60/60 mod, you'll have that burst fire around 95% Status, so that's why I have [Toxic Barrage] instead of [Contagious Spread].
Currently, there's also a weird quirk regarding weapon accuracy with this gun, so while doing my Steel Path Dailies and the Sortie, etc., I was seeing accuracy scores of 400% and such.
The alt-fire replaces the IPS with just Impact, and also adds viral. So with a Corrosive/Heat build, you'll be doing Viral/Corrosive/Heat with the grenades. Fantastic.
This did fine on Steel Path. In fact, you can start with grenades to soften up enemies with status procs, then finish them with the crit main fire. Very cool weapon. And firing with controlled bursts will mean you never run out of ammo. Very nice gun. :)