Cheddite 209s and Winchester 209s are interchangeable, especially with a light for bore payload.

You are very lucky to have solo 1250 handy. It has been out of production for many years. While a great powder, I don’t think it’s the best for light 12 ga loads. You would be better served with Solo 1000, Clays, international clays, red dot and most other faster burn powders. I save my solo 1250 for the sub gauges. But I understand wanting to use what you have on hand.