serge what kind of tuna you buy, buckets? My tuna is only 13g of protein.
Still I find it very easy to beef up the protein. My diet is already at 220g and I only put 1400 calories, 30fat, and 55 carbs in it so far. Still gotta get it up to 150 carbs and 2500 calories - that means atleast another 50-75g of protein going in. I don't see how you can't reach your goal even if you don't drink whey.