Official narrative:

Jack Rubenstein ("Ruby") shot Lee Harvey Oswald in his left abdomen at point blank range with a Colt Cobra .38 Special revolver in 2 inch barrel with a .38 Special standard pressure 158 grain full metal jacket cartridge. The bullet didn't over-penetrate but rather came to rest on his right abdomen just inside of his skin after penetrating his ribs. In other words, the bullet didn't over penetrate but was rather stopped by his skin after traveling through his body. The testimony of Jim Leavelle in the video below states that he was able to feel and move the protruding bullet just inside Oswald's skin before the autopsy. He told the nurse to use a spatula to cut open his skin and pull out the bullet.
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Reality of terminal ballistics and penetration of the .38 Special standard pressure, 158 grain, lead round nose/full metal jacket fired out of a 2" barrel:

The following videos of terminal ballistics testing of .38 Special and .380 ACP (less powerful than the .38) in standard pressure lead round nose and full metal jacket, respectively, with analogs to the human anatomy being shot at 7 yards proves this narrative is false. The .38 special is tested in the same barrel length, 2", as the revolver used by Ruby, thereby, effecting very similar muzzle velocities in both revolvers. The difference in velocity is not enough difference to make a difference, therefore, the terminal ballistics should be consistent between the analog in the test and the body of Oswald, if not more destructive to Oswald due to being shot at point blank range not from 7 yards away. However, because Oswald was shot a point blank range, the velocity of the bullet traveling inside his body was, indeed, faster than the bullets being shot 7 yards away at the analogs in the following tests. The .380 ACP is shot out of a 3" barrel but the additional length is not enough to increase velocity over the .38 special, also, the .380 ACP is much lighter than the 158 grain used in the purported shooting of Oswald, therefore, it should be mush less penetrating. Lower grain (weight) and less velocity absolutely effects less penetration, all other variables equal.

The .38 special standard velocity cartridge being shot at the analogs from 7 yards away still easily over-penetrated it. The same occurred with the less powerful .380 ACP. In fact, about half of the .380 ACP bullets completely over-penetrated two analogs representing the intended target and an innocent bystander.

If Oswald was truly shot according to the official narrative (38 Special standard pressure, 158 grain, point blank, out of 2" barrel), the bullet would've easily over-penetrated Oswald and hit one of the many police officers standing along the wall closely behind Oswald or the officers walking behind/beside him, or simply hit the wall behind him.

The last video is an interview of officer Jim Leavelle - the famous suit cop walking Oswald out to be transported just while he's "shot". His recollection of events is so vivid and detailed at his old age and after so many years of the event, it warrants suspicion. And there are discrepancies in his testimony. He also basically says the bullet travel inside of Oswald's body did some funky deflections which prevented in from over penetrating his body. That's two "magic bullets" in two days effecting two assassinations in Dallas! What is the probability?

Moreover, the police car immediately pulling up after Oswald was shot, thereby, blocking camera views of Oswald laying on the ground with officers apprehending Ruby looked like a high school theater scene.

Edit: the second video will not post because of this forum's altered format of letters in certain words (coincidentally the letters "gαy" at the end of the link) but simply copy and paste the video to watch it.

.38 Special Standard Pressure Lead Bullet Test on Human Analog (meat target tests simulating skin, pectorals, ribs & lungs)


.380 ACP Standard Pressure Full Metal Jacket Test on Human Analog (")
https://www . youtube . com/watch?v=nX3gpJ-gαy0

Officer Jim Leavelle's testimony/interview: