I'd wager that Quadran Rau rounds, even after piercing through the Valkyrie's hull, would still come in hot enough to cotterize an entry wound.
Does anyone know how big those Q-Rau rounds are? I think the rounds would be hot enough, I have a feeling the rounds are as long as a baseball bat and as fat as a coffee can, heat would not be an issue, Roy would have been ripped in half.