Yeah I no longer waste my money on BCAA's, straight L-leucine for me. It's cheaper and the only downside is it taste like shit...normally doctor up the taste with a squirt of Mio (flavored water enhancer). I've also seen studies that ingesting around 5g of Leucine before a whole protein meal has an increased amino acid uptake effect...essentially the leucine helps the body make more use out of the protein you ingest 10 mins after. You don't want to ingest the leucine at the same time as the protein due to absorption competition.
With ingesting such a large amount your body will most likely just piss out the excess (waste of product and money) and the body can also become desensitized with such a large amount being consumed at one time. Personally I see no need in going over 10g BCAA's...I believe this is the dose that's recommended with USP Labs Modern BCAA's.