SWs expand just fine. I've recovered them even way out around 200 yds when velocity is really down, and the bullet is expanded back to within 1/8 inch of the base.

If you double lung a deer behind the crease, as HUNT4ME describes, what will happen next is variable. The deer is dead on their feet but don't know it yet. If they don't know what happened or aren't scared, I have seen them jump, then just stand there and look around until they fall over. Or bolt a short distance, look around, and fall over. Or jog off, then fall over. If they freak at the shot, I have seen them take off at full speed for the next county -- just like HUNT4ME describes.

Think about this. If you double-lung through the ribs, the likely have no air anymore but can travel until their brain blacks out. Think of the recent Olympics. Do you think the 100m sprinters actually need to breathe much to run their race? No. Now mroe than double their speed and add a healthy dose of adrenaline and you get the idea on how far a deer can travel on a double lung hit with ANY bullet.

The problem isn't the bullet, it's placement (and I'm not saying anything is wrong with a double lung, I do them all the time). If you want the deer to be DRT, place any bullet higher and crack the shoulder blades to destroy its ability to run. Or, if you are really good, take out the heart. Either puts them down faster than a double lung. What kills deer from a lung shot is not bleeding out, but deprivation of oxygen. Any bullet that accomplishes that will be about equal to any other.

Another example is a 4-pt and 10-pt I shot from the same stand 3 years apart. Both were perfect arrows through the center of the heart standing virtually the same spot. The 4-pt was clueless, jumped 10 ft ahead, looked around, then turned to trot back the way he came. He made it about 20 yds and fell over. The 10 pt took off like a shot in the same direction, and I got very lucky to find him the next day 250 yds away. Both deer probably stayed on their feet about the same amount of time...it's what they did with that time that made the difference.

I could say similar things about blood trailing....all the bullets I've tried over the years and sometimes a lung shot will spray everywhere, sometimes nothing. I guess if the bullet does its job and the lungs deflate they really can't spray anymore, it's when they stay inflated and pressurize the chest that they leave a good trail.

Edited to add - if I find time at home I will take a picture of a SW taken from under the offside skin of a doe at 209 yds. Unless you think the bullet would expand LESS at the much higher impact velocity of the average 50-120 yd shot, this picture would remove all doubt on the ability of a SW to expand. I have 3-4 of them somewhere, and they all look about the same -- massively opened. I could compare side-by-side with an XTP I recovered, where only the front third expanded. If anything, SWs err to the side of too rapid expansion, I'd not use them on very tough game but whitetails are soft.