Has anyone worked up any Nosler loads in 140 and 150 grain 7mm-08?

Does anyone know what the difference in vel is between the 20 inch and the 22 inch barrel?

Just figure about 35 FPS per inch... thats a good average overall....there is no exact answer to your question as there can be as much as 150 FPS between barrels with the exact same load and all things being equal.