I have never seen problems with chromed cylinder. The best material combination between ring and cylinder are carefully selected from many years of experience through the development of engine construction. Chromium and cast iron goes very well together such as cast iron cylinder with chromed piston rings or chromed cylinder with cast iron rings.
As rule: never run same material togheter except the cast iron can run together as you will find in the older engine from old days.
I has experienced the flassed piston ring in the Peugeot 406 cars with the last engine EW10J4 in a short period due poor piston ring construction, it has nickel layer at outside of the pistonring in in upper compression ring. The piston ring are running in the engine block of cast iron. We replaced the piston rings in a short period cause the customers have complained about engine had high oil consumption. Later EW10J4 are improved, zero problem.
Piston ring gap is dependent on the actual operating temperature of the components. While cast iron has a very low coefficient of expansion, if the ring gets hot enough it will still bind in the cylinder. If .001"/1" bore has proven to work, that's great. Model engines seem to be made to the old .004"/1". I'm sure this gives the manufacturer piece of mind that the ring won't seize during break in.
Do not forget the liner are in the picture: The liner will expand where will led the ring gap will increase with increased working temperature. The cromed aluminium liner/cylinder will expand more than steel liner, also a bit more wide ring gap.
Edit: corrected wrong word..