Hey Coyote man, I've loaded a lot for small calibers. I've spent a lot of time with 17 Remingtons, and now the last year and a half with the 204 as well. These small calibers can be very finicky. I've had good success with H4895 in the 204. I have shot 40gr Vmaxes and 40gr Bergers, my best success has been with loads that are more towards the minimum, than maximum. As 284 said, guns are unique individuals. Some like speed, others don't. I am not sure why you have to achieve the 4000 fps, find a load that shoots out of your gun first. To be honest, those coyotes are not going to know the difference between 4000fps and 3800fps. Hope some of this helps and good luck to you!
I've posted a link devoted to the 204
http://www.rugerhunting.com/forum/