It wasn't a whole bullet. A full third of the bullet broke off. So the the largest fragment was PV/20 the remaining third of the bullet was in numerous small pieces.

You can even see the shape of PV/20 as shown below the xray matches the shape of PV/20 in the xray. The round cavity of PV/20 didn't show up in the xray so you see a round void.
So, you agree that the original PV/20 was not a whole bullet, so at least we are in agreement about something of some significance. Now, for your information the image you have posted of the badly damaged and distorted bullet, was a photograph taken by the defence ballistic expert, Major Mead, during his examination of the batch of crime scene ammunition (I think he took this and other images of bullets, during May 1986). We agree that the photographed example is the same as was removed by the pathologist, Peter Venezis, during autopsy performed on the afternoon of the 7th August 1985. The recorded weight was the weight of the damage bullet, as weighed by Major Mead, on that occasion, and clearly the bullet weight on this occasion demonstrated that this bullet was not a whole bullet, contrary to that described by the prosecution ballistics expert, Malcolm Fletcher, who in all his reports and findings described bullet PV/20, as a whole one (when it can't have been...
For your information the police did not provide this image to Jeremy, it was Jeremy and his legal team who remembered that Major Mead had photographed some of the bullets which he examined at Huntingdon Lab' in May 1986, and requested copies of those / these...
Conversion of the recorded (24.46) GRAIN weight, into GRAM weight, produces the following:-
1.714579gEley manufacturers specified weight for .22LR subsonic hollow point is 2.26 grams , from Hunter's book , but I think it is posted elsewhere as you say. The bullets bearing Hammersley's initials on exhibit numbers weigh 2.44 , 2.43 , 2.42 , 2.42 and the fifth , described as near whole , weighed 1.67 grams .
There are many anomalies in the ballistics which are indicative of deceit .