More than one gunman?

[I Ratant]

Was it the scope that became misaligned or the scope mount? From what I have read the mount was a fragile peice of sheet metal. I have never seen one up close because when they were still selling on Ebay, they cost more ($125 and up) than my Carcano was worth.

Ranb

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The crosshairs -in- the scope itself get knocked around by the recoil.
There's something about the FBI test shooters needing to shim the scope/mount in some unexplained manner to get the scope boresighted with the rifle, but that may be just an overzealous desire to get the scope useable.
It isn't really needed for the short ranges in Dealey Plaza.
I got mine at Redding Arms? in Culver City, for maybe $15 in 1994. I'd gone there to get a real clip for the Carcano, mine came without one and the local gunstores didn't carry any. I'd bent one up out of sheet brass which appeared to work OK, but Redding said they had the factory issue clips.
I saw the scope on an 1891 Mauser they had for sale, and asked "How much for just the scope?", and they pointed to the boxes and boxes of them they had on display.
I had a local gunsmith mount it on the Carcano, offset as shown. There's nothing really "shimmable" on the mount itself.
I picked up some genuine Italian Army issue ammunition in both 6.5mm and the later 7.35mm, at a gunshow not long ago. Still in the (disintegrating) cardboard shipping boxes, 3 clips to the box.

 

[Ranb]

You are a better shooter than I am. My case is one of the few CT cases in which the CTer's incompetence SUPPORTS the official explanation.

I have years of experience shooting. Shooting a bolt action rifle quickly is mostly a matter of getting your eye in back of the scope quickly then slapping the trigger as soon as the crosshairs line up. It is not about accurate shooting of the kind that all Marines learn in boot camp.

Ranb

 

[Ranb]

I picked up some genuine Italian Army issue ammunition in both 6.5mm and the later 7.35mm, at a gunshow not long ago. Still in the (disintegrating) cardboard shipping boxes, 3 clips to the box.

As far as I know Oswald used Winchester Western ammo shooting a 162 grain round nose bullet. It was supposed to be better than the Italian stuff even though it used a .264" bullet instead of the proper .269". I have no evidence to back up this though.

My carcano has a bore that is black and pitted and measures out at .269" The 160 grain RN I use in it clock at only 1800 fps instead of the expected 2200 fps, probably due to excessive wear of the bore. I upped the powder charge to get 200 fps for plinking. Despite all this it will group 4" at 100 yards. Not good, but good enough for short range shots.

Ranb