IMO, deer dropping on the spot has really not much to do with bullet design, and more to do with shot location. Having a lungshot deer run 50-100yds (basically dead) is not that uncommon, and bloodtrails on a higher hits often don's start right away. This can be true regardless of the bullet used. You could take just about any bullet and if you position a high shoulder shot, its likely they are DRT.

I shot one this year through the lungs with my .54 that ran close to 60yds with a big all lead bullet (that in my testing expanded to over 1"). She didn't even know she was dead, just scooted out of there as fast as possible till she tipped over.

My son killed a buck recently that ran about 100yds, shot through the lungs with a great bullet... Deep Curl.

Lots of great bullets available...good luck w your barnes.