Well that's quite a tasty rate .
Ought to flip and roll ok. (?) although setting it higher and using expo may help.
There was a good guide to flips n rolls on openpilot forum.
You probably need to :
Give throttle a blip before manoeuvre so that the quad is ascending then drop throttle during the roll/flip ,but be ready to hit throttle again as soon as right way up.
Also use full stick (roll) .
Just for reference , I use acro+ (same as rate but enables the acro slider/function)
I use 360 on roll
And pitch , and 55 on acro+ , all with no expo.
My 250 quads will pretty much barrel roll in forward flight at 15ft of the ground.
Then of course I try lower , faster , and then I'm picking mud out the motors !