Well Selmer,
You left out a couple of real important items such as what weight bullet you are planning on using and what your intended targets are going to be.
Now, if we are talking 250-260 grain weights, you can load up 9 grains of WW231 for somewhere in the neighborhood of 900 fps give or take. This is very easy to shoot and I've got .357s that may recoil more heavily than this load does. If you want medium loads, I'd recommend you go with 2400 or Blue Dot over Lil Gun. 25.0 grains of 2400 should give you a velocity around 1600 fps. Again, this is with a 250-260 grain bullet and an educated guess on my part. I shoot Freedom Arms revolvers chambered for thi sround, not Encores.
At this point, you are going to have to be careful on bullet selection. Most bullets are not designed for these velocities and I have heard of some blowing up in flight. Soft bullets is more of a consideration in revolvers due to the chance of damaging the forcing cone, but poor performance on game animals is another consideration. No use in over-driving a bullet only to have it blow-up and cause a nasty flesh wound.
Having said all this, my best recommendation to you is to get the Speer and Hornady manuals and use their starting loads with whichever of their bullets you choose and use a chronograph to keep velocities in check. If you choose to use a hard cast bullet, Cast Performance provides loading data for their bullets as well.
BTW, I do not use fillers.
