Hi Cody. were you able to tell anything about how the petals tore anything up inside or was the high hit making that difficult to tell?
Ok so I talked to them a bit more. It was a very hard up hill shot, steeper than 45°. The bull got up around 65 yards and sterted walking away and turned and looked back, at a pretty hard quarter. The shot entered center shoulder, went through just a small section of the front of the chest cavity, then center punched the spine in the neck/shoulder junction area, and continued to punch through meat until it was under the hide center neck on the off side, penetrating through around 2+ feet of elk. The blood shot wasn't that bad, and the elk dropped and didn't move at all. If it would have it would have rolled down the hill. As far as petals, they didn't find any, but even just grazing into the chest cavity, the lungs were mostly jello.
They said the bullet looked like a roller bearing, with the completely flat frontal area that they look for with these specific mono bullet designs.
After reading, according to some high tech ballistic studies, a smaller but flat frontal area traveling at higher speed creates a larger permanent wound channel than a larger traditional rounded mushroom bullet. What it says is that it takes more energy to mushroom a lead core bullet than for a mono to shed its petals, thus slowing the bullet down more, creating less of the hydrostatic shock and wound channel due to lower velocity, and also the rounded front causes less damage traveling through the animal than a flat one. The monos with this design shed their front petals rapidly and do not use as much energy doing so, and the flat fronted shank going at a high velocity creates a shock wave in the internal tissues, thus leaving a large permenant wound channel and generally getting deeper penetration.
This is how I understand it so far, and it seems to make sense.