I have had a 512 (5') on a 723 and a 727 for several years and it handled it well. I have cleared 2'-3' drifts and 2' deep stuff the plow truck threw in to the drive. Deep stuff I just slow down to let it keep up. The only time it plugs up is if the snow is real wet and slushy, basically I did not even need to blow it I just wanted to

I currently have a 727 w/ a 412 on it (4'). Has not real snowed yet but it should do just fine. I have always run the bar tread tires with no chains. I get plenty of traction. Chains would tear up a black top drive I would think, With the 512 I probably could have used a little more weight in rear. The 412 is fine