If I sell a stock holding with $50,000 gain this & another holding with $50,000 loss, would gain & loss offset each other with no tax liability? Both held for 2 yrs.

Yes, this would be a long term gain and a long term loss which would offset each other giving you no tax liability as long as the loss is equal to or greater than the gain. 

Since I'm planning to sell stock holding with $50,000 gain and another holding with $50,000 loss, would you please confirm that there is no maximum limit of stock gain that I can offset against stock loss?  Thanks again.