Small Aircraft
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 4; Flight Crew Total 925; Flight Crew Type 860
Communication Breakdown
Conflict NMAC; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
I was returning from LWC to ZZZ at 2;500 MSL approximately 9 miles NW of LWC heading NW.  I Encountered another small aircraft maneuvering at my 8 o'clock.  Aircraft went underneath and then turned and climbed toward me at my 5 o'clock.  It appeared the aircraft was performing commercial maneuvers (chandelle?) in a possible training flight. Best option was to add power versus trying to make evasive turn north or south since I wasn't sure if the other aircraft saw me.  Landed at ZZZ without incident.
GA pilot reported an NMAC while in cruise flight with another small aircraft that was executing practice maneuvers.