Having personally witnessed a 7mm mag round bounce off, a 165 Sierra GameKing out of a .300 Weatherby splash off the shield
Not to switch livestock but bulls%^$.
Of course if I tell my wife this she might let me get that Westley or Holland double rifle in Gibbs, Rigby, Nitro or something similar. I'm thinking she's probably going to tell me to shoot for the head or put more powder in the loads though. Stay tuned, daddy might be about to get another piece of iron.