Surprisingly enough that is not an uncommon incident during group shoots.I shot one of my best groups ever on another guys target at benchrest shoot. Embarrassing as hell. Some of the old guy laughed said it happens all the time. The guys target I shot had his best group ever that day. I said all the fliers were mine.
There is some mental pressure on the shooters and they pick the wrong target with the high power scopes picking the wrong long range target.