I'm very aware of how to teach aeros and MRTs, but I believe you were discussing "good steep turns" rather than MRTs. Very few light aircraft have the power to sustain much more than 3g in an MRT without descending. As an aside, the gotcha when descending to maintain something approaching Va and max turn rate is remembering to resist the aerodynamic pitch-up when levelling the wings - best to unload before the roll.
Yes, a "granny loop" can probably be flown in a lightly-loaded aircraft at 3g but it is unlikely to be circular.
HFD