Ah yes that lovely sensation of meat sitting in the stomach. I've gotten it both with raw and cooked meat. Lack of bile flow, lack of enzymes, damaged intestinal track, allergies, toxin dumping ext. Don't be afraid of that term 'toxin', assuming it's a clique drives a lot of people away from a brilliant diet that is raw paleo. Why? Because so many people have different toxic debris in different spots, and this can take forever to get pulled out. When other people practicing the diet say toxins are rubbish quackery, then when people actually do go through detox they feel the diet isn't working for them. Thus they back off.
What I do some times is just make some bone broth, warm it a bit and then toss raw meat in and eat with some ox bile. Works great for me. Broth I can safely say has saved my ass on numerous occasions now. Don't care if it's cooked, I care if it works. And as always, make sure it's 100 percent no supplemented no lies grass fed. Go and spy on the farm if you have to, it will really depress you how low some people will go to sell products. But you got to do it some times.