Density of shrapnel holes tell us something about the weapon used, if the location of the explosion is known. Some scientific rule determine the density related to distance.
This law is called “inverse square law” and is explained in the image below.
Some people believe that a BUK could not have been used to down MH17. This because the location of the explosion does not match with the density of shrapnel holes observed on MH17. They use the damage of the AA test to compare.
Please use this post for all further comments on density!
In this thread at my website an interesting discussion is going on about density. User Eugene made the image below.
However the position of the cockpit window of B777 compared to IL86 is not the same. The cockpit window in image below of the B777 is the most closest to the tail. The cockpit window of the IL86 is second closest to the tail.
The image below shows the reconstruction of MH17 and the damage seen after the test done by Almaz Antey. The image was made by user sotilaspassi on this website.
What we see is that the area on MH17 with likely the most density of fragment holes is totally gone. So we cannot compare the density of this area with the same area on the IL86.
This is one of the few photos publically available which shows details of the results of the test performed by AA, The photo shows the area just under the cockpit window on the lefthand side of the IL86 , just left of the centerline.