I do have a chamber vacuume packing machine and I am now trying to bag burgers at different pressures. 
Burgers float in a standard 3mil boilable bag  99.3% , at 99.5% bag sinks. At 99.7% it felt as if the burger was compressed some. 
Shooting for 54c  
cooking 1/2 pound Kobe Beef patties for 2 hours 
also trying one with the baggie method. 
should be interesting.