During the depletion phase , muscle glycogen levels fall from 150 mmol/kg to 25 mmol/kg. During the super-comensation phase, glycogen levels typically rise to 225 mmol/kg, giving 50% more muscle glycogen than normal and in some times you can achieve more than double the normal levels.
The chanses to get it wright is very small, that becouse during loading every gram of glycogen will retain 2.7g of water. Carb loading it just to complicated. I would recomend carb loding for other sports such: power lifting, wresling,runing etc.. but not for bb.
Done well it is effective, the problem is dipends on to many factors.
Depletion has to be sufficient to stimulate the activity of the glycogen storage enzyme (glycogen synthase). Without that, the excess carbs will make you hold more water. Another problem is that glycogen depletion, and loding, occurs only in the muscles exercised. Clever studies have shown that if you exercise one leg to exhaustion, for example, than sit aruond and eat carbs for tree days, the glycogen content of that leg will increase two-fold above its pre-exercise level. But the glycogen content of the other leg will remain unchanged. Another factor AAS and HGH.
The next problem is the loding itself, you have to maintain a stedy flow of insulin with as little fluctiation as posisible in the blood levels of insulin. To do this , carbohydrate intake must be as even as possible. Delaying the start of carb loading after the finish of depleting exercise reduces the loading response. So does the type of carbohydrate.
You mast know exactely how much carb you should eat after first hour of deplition, and how much every 1-2 hours in the first 24 hours. Also dipend how big you are. Is just to complicated for bb, it is OK for a marathon runner.