The load I'm working on for my Tikka Varmint .223 1:8 is 80gr Amax, 24.5gr Varget, CCI BR4, COAL 2.410 which is approx .030 off the lands in my rifle. I have yet to play with different seating depths, but this load currently shoots 0.32 MOA. So far I've shot it out to 700yd and I'm very happy with the results.
Work up in .1gr increments and make sure your scale can accurately measure to 1/10th gr.