Re: .40 S&W
coastie.308,
No, absolutely not. Accurate #9 is a good powder, but it's roughly equivalent to H110 or W-W 296. In other words, way, way too slow for the 40 S&W. It'll work great for 357 and 44 Magnums, or other big, high performance rounds like that, but is completely out of place for the smaller capacity cases like the 40. In the Accurate line, you might take a look at #5, or something similar in burning rate from the other makers.