My pet load in my GG is 47.5 grains of 3031 pushing the Hornady 350 RN. It iz amazingly accurate. 3/4-1" groups with regularity and 1/2 inch when i do my part. I am tending to the mild side with that load. Your 54 grains sounds pretty darned stout, but no way should you be having pressure problems at 48.
