I have the 30-30 version of the Rio Grande which is more or less a Marlin 336 clone.
It like the Rossi 92s cleaned up to be a very smooth and accurate rifle.
NIB it was full of cosmoline, metal grindings and dirt & had a couple of burrs.......one on the lifter and the other in a bad place in the throat of the magazine tube where it meets the receiver. The mag tube itself was filthy.
After stripping, cleaning, deburring and a coupla shots of Remoil it's amazingly slick and accurate with the factory Hornady 160 grain LEVERevolution FTX ammo.
I topped it with a Bushnell Trophy 1.75-5x33mm scope.
The Rio Grande rifles like the Rossi 92s are "diamonds in the rough".