[reberly]

I am never claiming to be a pro, but I use chainsaws almost daily. Without seeing the kind of bind it is difficult to answer. I have had chains bind for two reasons. They were a bent bar or a chain with too agressive an angle. Is the chain digging in to too much material? If the chain is digging in, it might be too agressive (flat) an edge like a ripping chain. The rackers might be too low as well. If I had one of my chains digging in with too much bite, I would try to put more of a point on the teeth without lowering the rackers to see if it helps.
When my bar was bent from felling a log across it it wouldn't track straight in the logs anymore either. That bar is now a designated stump digger. Good luck and I would love to hear the solution you find. By the way, I would quick check my sprocket and my clutch. I burnt out a clutch bearings on my 880 once and it felt like the chain was binding for the whole cut.
Rich

 

[reberly]

I wonder about the ripping as well. I usually sharpen my ripping chains at 10-15 degrees but my regular chains at 35 degrees. If you were ripping with a standard chain I would wonder if it overheated. I have had trouble ripping with standard chains as well.
Rich

 

[reberly]

I don't change my chain angle for winter, but if I am digging a stump out with my chainsaw, I actually change to my oldest bar and my oldest ripping chain. Those stumps can yield some beautiful turning stock.
Rich