I don't have a scopecam, I simply put camera on cheekrest when needed. In this film, it was all sfx.
You see where the deer is lying, same spot as he was shot, instant collapse, didn't even raise a hoof. I am finding the 6 XC (basically a 243 engineered to shoot the heaviest 6mm bullets) to be just as effective as my 6.5mm.
Allthough visible sign on impact is less, they walk no further. Yesterdays reds fell maybe 5-10 meters from where they were shot. I am really starting to see why 243 is well regarded here, at home it is legal for roe only.