Hey Carbon, please excuse, switching into 'old school' mindset:
Back in the day, when building forged piston engines, we would up the bore clearance about .0005" per inch of bore, to allow for the larger expansion of the denser aluminium forging. Would also caution the customer to avoid overheat and try to break-in on cool days/mornings. If at any time the engine felt doggy or a slight loss of power (initial symptom of piston seisure), the customer should IMMEDIATELY drop throttle, pull in the clutch, and coast along allowing the engine to cool in that coasting wind. Then, cut ignition and pull-off to the side and let it cool to warm-to-touch before trying a restart.
During that period of history, piston cross-section shapes could be either circular, or oval, in an attempt to control expansion geometry. Hopefully, the oval profile would heat-expand to circular.
Okay, 'old school' mode off.
I'm sure modern designs have licked that old issue, but the piston seizure emergency procedure may still apply...