IPSC-1. I'm calling BS on this.
In what exact part of their anatomy did you shoot these 19 deer? Unless they were all neck or head shots, I simply don't believe you.
I've killed 35 to 40 deer myself and seen a few more shot by others. Unless you get a CNS hit, a deer shot even through the heart or both lungs, is going to run a bit, much more often than not. Occasionally they will drop in their tracks with a heart/lung hit, but only occasionally. If you shoot 19 deer in the heart/lung area in a row, I would bet my next monthly paycheck over 50% of them would run some distance. Probably more like 75% would. They won't go far with a good hit, but they will run...
So, care to clarify your shot placement?