Can anybody provide proof of a successful reenactment of Oswald's feat?

[Jerry Freeman]

The commission did believe her. What that means is he spent a great deal of time dry firing the rifle. Dry firing the rifle is practicing.

No they didn't and no it's not.

[Jerry Freeman]

     MARINA said she had never seen OSWALD practice with his rifle or any other firearm and he had never told her that he was going to practice.(Warren Commission Hearings, vol.22, p.763 [Commission Exhibit 1401])
     She cannot recall that he [Oswald] ever practised firing the rifle either in New Orleans or in Dallas. She does not think he did practice in New Orleans because as a rule he stayed home when he was not working. When he did go out, she did not see him take the rifle.  [Commission Exhibit 1403]
     The reporting agent interviewed Marina Oswald as to whether she knew of any place or of a rifle range where her husband could do some practicing with a rifle, and whether she ever saw her husband taking the rifle out of the house. She said that she never saw Lee going out or coming in to the house with a rifle and that he never mentioned to her doing any practice with a rifle. (Warren Commission Hearings, vol.23, p.393 [Commission Exhibit 1785]
     Marina Oswald was asked if she ever saw her husband doing any dry practice with the rifle either in their apartments or any place else, and she replied in the negative.  [Commission Exhibit 1789]

     Marina changed her tune when she testified...MARINA advised that OSWALD had told her after the WALKER incident that he had practiced with his rifle in a field near Dallas. She said further that in the beginning of January, 1963, at the Neely Street address, he on one occasion was cleaning his rifle and he said he had been practicing that day. She said [that] on an evening in March, 1963, … OSWALD left the house at about 6:00PM. OSWALD had his rifle wrapped up in a raincoat … When OSWALD returned about 9:00PM, he told her he had practiced with the rifle. She said [that] on an evening in March, 1963, … OSWALD left the house at about 6:00PM. OSWALD had his rifle wrapped up in a raincoat … When OSWALD returned about 9:00PM, he told her he had practiced with the rifle. Warren Commission Hearings, vol.22, p.197 [Commission Exhibit 1156] 
     Unfortunately, the rifle which Marina Oswald had apparently watched her husband clean early in January 1963 did not [reportedly] come into his possession until more than two months later, toward the end of March (Warren Report, p.119)
    The Warren Commission was aware that many of Marina Oswald’s statements were contradictory and unreliable, and that she was under pressure to tell the authorities what they wanted to hear. According to an internal Warren Commission document, which became public 15 years after it was written, “Marina Oswald has repeatedly lied to the [Secret] Service, the FBI, and this Commission on matters which are of vital concern to the people of this country and the world” (HSCA Report, appendix vol.11, p.126).

[Jerry Freeman]

The point is - did LHO ....

...Do all that stuff. But an even greater point of the thread...Could ANYBODY at all have done all that stuff? I guess they could have if they were a combination of the Amazing Kreskin ...Houdini...and Superman.

[John Iacoletti]

The WC examining CE 543 and discussing his Marine Corp training believed he was dryfiring.

Begging the question.  Even if CE 543 showed signs of dryfiring, that doesn't mean that it had anything to do with Oswald.

In any case, Marina didn't see or hear anything that would indicate that Oswald ever "practiced" by pulling the trigger on this or any other rifle.

[Walt Cakebread]

     MARINA said she had never seen OSWALD practice with his rifle or any other firearm and he had never told her that he was going to practice.(Warren Commission Hearings, vol.22, p.763 [Commission Exhibit 1401])
     She cannot recall that he [Oswald] ever practised firing the rifle either in New Orleans or in Dallas. She does not think he did practice in New Orleans because as a rule he stayed home when he was not working. When he did go out, she did not see him take the rifle.  [Commission Exhibit 1403]
     The reporting agent interviewed Marina Oswald as to whether she knew of any place or of a rifle range where her husband could do some practicing with a rifle, and whether she ever saw her husband taking the rifle out of the house. She said that she never saw Lee going out or coming in to the house with a rifle and that he never mentioned to her doing any practice with a rifle. (Warren Commission Hearings, vol.23, p.393 [Commission Exhibit 1785]
     Marina Oswald was asked if she ever saw her husband doing any dry practice with the rifle either in their apartments or any place else, and she replied in the negative.  [Commission Exhibit 1789]

     Marina changed her tune when she testified...MARINA advised that OSWALD had told her after the WALKER incident that he had practiced with his rifle in a field near Dallas. She said further that in the beginning of January, 1963, at the Neely Street address, he on one occasion was cleaning his rifle and he said he had been practicing that day. She said [that] on an evening in March, 1963, … OSWALD left the house at about 6:00PM. OSWALD had his rifle wrapped up in a raincoat … When OSWALD returned about 9:00PM, he told her he had practiced with the rifle. She said [that] on an evening in March, 1963, … OSWALD left the house at about 6:00PM. OSWALD had his rifle wrapped up in a raincoat … When OSWALD returned about 9:00PM, he told her he had practiced with the rifle. Warren Commission Hearings, vol.22, p.197 [Commission Exhibit 1156] 
     Unfortunately, the rifle which Marina Oswald had apparently watched her husband clean early in January 1963 did not [reportedly] come into his possession until more than two months later, toward the end of March (Warren Report, p.119)
    The Warren Commission was aware that many of Marina Oswald’s statements were contradictory and unreliable, and that she was under pressure to tell the authorities what they wanted to hear. According to an internal Warren Commission document, which became public 15 years after it was written, “Marina Oswald has repeatedly lied to the [Secret] Service, the FBI, and this Commission on matters which are of vital concern to the people of this country and the world” (HSCA Report, appendix vol.11, p.126).

Let me see if I've got this right..... Lee Oswald practiced firing the carcano on several occasions ..But he never discovered that the scope was MOUNTED ASKEW....   ?? 

[Jerry Freeman]

  Even if CE 543 showed signs of dryfiring,

It wouldn't... as the firing pin merely strikes air in a centerfired rifle [or pistol]
 If dryfiring is a form of active practice...why has the military then spent millions for range ammunition?

[Richard Smith]

The usual deficient response....made over and over.
 Marina in her testimony did state that he went to the park and shot leaves and also went out to the airport to practice.
The Commission didn't believe that and also, Richard Smith knows this but simply likes to be argumentative...it is a fun way to be 

Ask for evidence, be given evidence, suggest evidence is fake.  The old CTer impossible standard of proof.  Oswald's own wife confirms that he practiced with his rifle.  You don't like that fact so it must be false.  Just dismiss it and move on.  The WC concluded that Oswald had practiced with his rifle including dry practice as described by Marina to improve his proficiency with the rifle. Confirmation from his own wife who spent more time with Oswald than any other person is compelling.