I wonder if that was deliberately done with a string and a caseload of Bullseye or Unique and remotely fired.
I suppose anything is possible, but why would anyone do that? Especially with a decent scope mounted?
I'll play the Devil's advocate. It could be mounted later, but would be difficult to boresight...
I use both AA7 (.45 Super, .460 Rowland) and RL 7, mainly for .458 Socom, but it does have good application in the .45-70. Haven't tried it yet, but if I do, I'll take the Leupold off.