Taz..yes. I've dont that a number of times. The bottom line is...if you absolutely know for sure that you made a double lung, (whether you saw the deer go down or not), that deer was probably dead before you even thought about another chance, and like wolfen said, usually somewhere between 50-100 yds. Personally I've never had a double lung hit go more than 100yds. Of course if you aren't sure of the hit....that's a different story. Sometimes a not so good hit, can "lay" down within sight....and you might assume they "went" down. Big difference. I had a nice buck that I shot one time and could have sworn that I double lunged him, and I saw him go down about 60 yds out(in some tall grass). Of course, I assume he's done, and 30 mins later....following the blood, up he comes, and off he goes....full steam. I did end up finding him, after backing off, and letting him expire...6 hours later. I turned out that he must have turned on me as I shot, and the angle wasn't as good as I had thought...and I never saw him turn, I thought I had a perfect broadside shot. Just a thought to keep in mind.