you double the shots (front loading) so that more of the hormone is freed quicker. so instead of waiting like 4-6 weeks for the test to really kick in, it takes like 3.

and to your other question, your weight will probably be constant for a while after the drol stops; some will be losing bloat and gaining muscle, other will just be less bloat from the drol, but more from the test. so you shouldn't fluctuate all that much.