One of your problems is the 2315's are w-a-a-y overspined for your bow. You'd be better served with 2215's, and you might as well get them cut to 30". You'd wind up with arrows running about 515 grains instead of 560 grains, which would gain you about 3 fps. Add that to the speed you'd gain if you can get the bow silenced without using the leeches and your performance would be much better. As it stands now, I doubt you're shooting over 190 fps, if that.

-ArthurP