Did you look and see wich way the deer ran, then go as far as you can to make sure the deer just ran off a good ways and died? I had that problem with Sabots out of my Rifeld Barrel Shotgun, the first few deer I shot there was hair and no blood. I assumed I missed, I looked for about 30-40yds and found no hair and blood and gave up.I shot the gun the next day and I was hitting bullseyes so I know it was on. Well a few days later on a deer drive a friend found the deer I shot in the red brush about 40 more yds further than I looked, it was a perfect lung shot.
Them damn sabots just punched a small hole in the deer about pinky size and the exit wound plugged up with fat so no blood. I was bummed. The next day I shot a Big Doe at 50 yds, same thing, hair and no blood, this time I went further in my search and there she was dead and no blood trail no even a drop! This Doe went 90yds.
I switched from shotgun to ML and never went back with much better results using the 240gr XTP's. Now when I hit one there done. Also I never had a problem using a smoothbore shotgun with the old Foster Type Winchester Slugs, they did some damage but I wanted a better accurate gun with more distance so I went to a rifeld barrel, bad choice.
The ML Bullets you using will do the job on a deer, they may not do it on the spot or leave any blood, but if there put where they should be no deer can survive being shot through the heart or lungs.
I wish you all the luck and a successfull hunt!
breechplug
So if your a good shot and you know it and your ML is on, dont assume just because there's no blood and just hair that you did'nt get a kill shot, look as far as possible and you may be surprised what you'll find