I think your right in that depending on where your getting the calories from it will be a bit different. However, I suppose it depends on what the rest of your diet is like as well.
Your body does store protein, its your muscles...
If you get too much at one time its basically a waste.
"
The body is unable to store excess protein. Protein is digested into amino acids which enter the bloodstream.
Excess amino acids are converted to other usable molecules by the liver in a process called deamination. Deamination converts nitrogen from the amino acid into ammonia which is converted by the liver into urea in the urea cycle. Excretion of urea is performed by the kidneys. These organs can normally cope with any extra workload but if
kidney disease occurs, a decrease in protein will often be prescribed.
[13][
citation needed]
Many researchers think excessive intake of protein forces increased calcium excretion. If there is to be excessive intake of protein, it is thought that a regular intake of calcium would be able to stabilize, or even increase the uptake of calcium by the small intestine, which would be more beneficial in older women"
-wikipedia lol
anyway, I dont know what your current macro's are and knowing you, you probably have no idea or dont care :P. First I would recommend if your going to try to get all this from protein to space them out in more then 2 shakes a day, perhaps 4 smaller ones.
I would advise you to break it up some. get some fibrous or a starchy carb in, and some good fats along with your protein.
500 cals could be something like
1 piece whole grain bread, tuna+mayo + peanuts/almonds
Potato + chicken breast + some veggies
2 small shakes + pbutter + oats in them
etc... I think theres a much better way to do this, but I really dont know what your carb/fat/protein ratio is...and to be honest im still working on understanding it better myself. You should probably ask Dan this question and see what he says.
6'3" @213
Squat 1x20x275
press:200, Deadlift:475, Bench:300, P.clean:235, Squat:385
"The only failure that is final is to stop trying to improve"