I was getting great accuracy with 26.8 grns of vn133 with hbn coated 39 grn s/b/k doing just shy of 3800 fps, im using vn 530 at the moment but will go back to vn133 when that's used up as there seems to be a lot more pressure with 530 !!
26.8 grns vn133 was quoted at 3900fps with naked 39grn sbk's but I don't think you'll get that, a lot depends on barrel length, what rifle do have a barrel length?
Work your load up, and br4 or rem 71/2 primers with thicker cup will be a good idea in the 204, although I was using fed gold medal primers with the vn133 with no problems, but vn530 is a different matter!!
Good luck