Your pic doesn't look grainy to me. Have you printed it optically? I'll bet it would be even less grainy if you did that.
Films are so good these days that I have had trouble getting enough grain in certain applications. Provia 400X is an absolutely amazing film (as was 400F before it). Cross processed 35mm, rated at 100 (which should increase graininess) held up amazingly in some 12x18 prints that I did.
(there was a url link here which no longer exists)