Never quite understood this exiting vs no exiting point. I tried 40 gr Vmax last year & to be quite honest I had a few that seemed to take an age to go down, plenty of tail twisting etc all hit just behind the shoulder, in the boiler room. I tested some ballistic tips out on a target using an old bookcase on its side, the bullts went through the first shelf no probs, but you had to look hard for any sign on the second shelf, if you looked carefully you would see many tiny indentations, those bullets had vaporised into particles smaller than bird shot.My thoughts are that if a BT bullet hits a strong fore rib maybe just maybe they are too explosive, these bullets were designed for smaller critters. I am sure that most people would swear by the Vmax, but for me personally it put a cloud on the proceedings. Since then I have gone back to soft points, usually they knock em down like they were hit by a train usually with an exit., but the first fox I shot after moving back, ( a very large dog) ran & I could not find it. Found it in the morning 120 yards away with an exit wound you could have put your foot in, shot accurately just behind the shoulder, that fox must have run on sheer adrenalin. Go figure, maybe the more you shoot, the more variance you get, but these incidences play on your mind, maybe a bit too much sometimes.