JTH,
A ten weight is rated for 280 grains. So putting a 400 grain line is a lot of weight, keep in mind you will collapse most rods if you double the grain weight. Think about what you are trying to do - How deep do you need to get? How much velocity are you trying to get down. Also don't get stuck in what grain weight do I need. Think about how fast, how deep, and what size fly you are trying to toss. Density controls sink rate!
Rio Striper 26 DC is a great line.
JT