Always hone the bore when installing new rings! A cylinder bore can look good but still be egg shaped from wear and heat, when in doubt or if you buy the block used>ALWAYS measure the bore! Unless you ran this motor from when it was new you do not know for sure the history of this engine. It may have been rebored and you might have put a standard piston in it not knowing any different. If you had re-honed the bore before you installed new rings I can tell you that just by idling the engine a few minutes you did not seat the rings. I start the engine, let it idle until it obtains approximate running temperature, then I hammer it. Load it as much as you can!! Those rings have to expand under good pressure to seat properly against the cylinder wall. I would measure the bore, and if the bore matches the size piston you put in it then I would re-hone the bore prior to assembly/wash out. Chances are you can still use the rings you have if the bore is the proper size. Do a proper engine break in then see how it acts.
Bruce