Was thinking the same thing Ruger MKII at 100 meters on a tin can with open sights is questionable.
A little over 100mm x 73mm sized can. I don't see how that is so amazing when people all the time hit a clay pidgeon that fly through the air and it is much bigger target than the steel rams I was shooting at 100 yards.
Since you did not say you used an optic or a rest, this is a questionable claim.
No optic, open adjustable sights the stock ones found on MKII Target. See pic I found online. No ransom rest or sandbags.
What do you define as "rapidly"?
I would guess maybe 11 in 20 seconds. Which was a higher rate than I noticed when shooting comps with .22 rifles. Of course this is with a selfloading pistol with minimal recoil. The FN 5.7 is along those lines too but I was much slower with it.
How many ranging shots did you take before this accomplishment?
That matters little or possibly not at all. Once the gun is sighted in and you can use it over a long period of time with repeatable results unless you switch ammo, get a new lot, or the sight somehow loses alignment.
Was this tin can the size of a Buick?
Hardly average size. That said I once had an HK P30 .40 that I couldn't hit a 55 gal drum with at 25 yards. It went to the gun show. The grip was ergonomic but it was somehow useless.
Maybe you could provide strong video evidence of this boast.
I wish.