If you are caught in possession of 500g of steroid raws, that's a possession charge. Maybe 2-3 months max imprisonment, worst case scenario.
Yes... Hard time lol
Raws are no issue getting through the border and if you are only doing your own stuff you could get away with a few grams here and there of your favourite compounds and what maybe 50-100g in total?
Remember drug detection dogs are trained to smell the recreational drugs and not the 40 plus odd types of steroid raws there are.