In the 223, Blue Dot at 13 grains is a winner.
with 55 grainers, for the average nimrod, make that 12.5 grains...
and don't blue dot with heavier weights, such as 60s, 63s, 68s, 70s, 75, 80s... unless you really know what you are doing....
If you want to go heavier, 5744 or 4198 is a good choice to investigate...
