The environmental conditions would almost have to be devoid of wind, mirage and high humidity thus I think that the range at Whittington Center at NRA's playing grounds near Raton New Mexico would be the place to try it. I also think that this drill could never be accomplished with a bolt gun unless one was a wizard from hell with such. Initial ideas for rifles include the SR-25 from Reed Knights Inc, a M1A, FN/FAL (maybe...last choice for me) Hk's PSG-1...A REAL one not a reworked Hk91. Just a few of the possibilities. Possibly an FPK or SVD ?? (I'll leave that choice to Archy as I have only plinked and done some formal DOD schooling and familiarization with those. Not bad rifles at all, I just think Archy has more data and experience with em.
Ya got my brain pan juices running on this idea. I live close to Mr G. David Tubb and see him at my local range sometimes so I'll run this by him next time I see him.
I believe it'll happen from a solid bench rest, sandbagged and maybe even using yer buddies Accupod gizmo for a fast solid return of the crosshairs....
My new game 'n goal to play with for a while......Thanks I had heard of this but forgot about it......20x20x20@1000..........tick ....tick.....tick.....:o) Stay Safe !