RDRickster,
As mentioned above, coming from an ungoverned R22 in the past to a B47 was easier back then. You usually knew to lead with the throttle when you reduced collective in any manouvre outside the norm.
I have two rules for driving a 47 -
1) Always lead with the throttle. For example if you are about to do a quick stop, role the throttle back till you can feel a slight back pressure coming from the correlation box. When you feel the correlation come into play you can be pretty sure that any further reduction in throttle will produce an RPM response. Read on for the rest.....
2) Always control RRPM with the collective. This is by far the easiest (and safest) way to control the RPM in a 47 no matter whether it has heavy weight blades or not. In the mustering game conducting quick stops, it is normal to completely role off the throttle alltogether and control the RRPM soley with the collective. It is also easier to feel the engine re-engage with the rotor system when you wind the throttle back on to fly away.
As you probably know the biggest difference between an R22 and a B47 is the correlation. It is well documented that it you find yourself in a low RRPM situation in a 22 you must wack on the throttle before lowering the collective. This is due to the exceptional correlation of the Robbo, when you lower collective you also reduce ERPM. This inherently teaches you a mind set to control RRPM with the throttle. In 47's, the only effective way to control RRPM is with collective, as the higher inertia in the rotor system makes the throttle response lag so far behind.
The only other suggestion is to Listen to the RPM whilst doing any manouvre. In the end you won't even need to watch the gauge.
Hope this helps
Cheers