Instead of posting a second post I just add both together. It wasn't a bump. Why?
RightAnyway, is the disintegrate explosive affected by SR (I'd assume no)
To set it is a standard action, but if you drop it, and it's a shock triggered explosive, you're now in the middle of the blast. You don't take as much damage, but you're not immune either.It's a pretty powerful feature since you could detonate as a standard (to set) plus a free action (to drop it), though I'm not sure if that's what you intended.
Maybe I'm not understanding the question?