Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Conflict NMAC; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Human Factors
In cruise flight received RA to climb. We complied with the RA and climbed to 8500 until clear of conflict and descended back to 8000.  Separation was only 300 ft. These types of events are difficult to prevent.
[Report narrative contained no additional information].
CE-750 flight crew reported an NMAC event during cruise.