8.0 grains of UNIQUE is your load...I have never put a bullet on top of this that WASN'T accurate...no matter what the weight. If you want a little more velocity try 9.0...that is what I am using in my hunting loads.
That Lee Martin design looks great...you aren't likely to ever recover one from a deer unless it is hit dead on in the chest...
...and put a good HEAVY crimp on these rounds....it really helps with the consistency of the powder burn...