To be completely accurate, Eley subsonic hollowpoint .22 lr (lr means long rifle). There was other .22lr ammunition at WHF belonging to Anthony Pargeter. This was high velocity jacketed ammunition, i.e. copper clad over a lead core. This ammunition did not have any lead exposed and used a different lubrication method. It is possible (although I accept there is no direct evidence of this) that some of the ammunition fired was from Pargeter's batch. It is conceivable (although again I accept there is no direct evidence) that one of both of Pargeter's ammunition magazines was used.
Anthony Pargeter's rifle was the " other " rifle that was used in the murders. Different rifle,,,,not as long as the Anschutz,,and fired different bullets. Although the Anschutz was seen on Sheila's body,,,it wasn't the rifle that fired the fatal shot. Did we ever see the damage that was done to one of the rifles.? No.
Pargeters ammunition wouldn't have fitted the Anschutz and vice-versa. They both have different widths and lands.
No fingerprints were ever taken from any of the other firearms in the farmhouse. There isn't a single witness statement from any officer stating which weapons were found at the scene,,,where they were found,,,,or what condition they were in. None of the relatives adequately listed all of the firearms in their witness statements,,,and none of them testified at Jeremy's trial as to which weapons were found at the scene. No photographs were ever released showing the numerous other firearms in situ.
When it gets to such a report where it does mention firearms that were found inside the farmhouse,,,,a large black space was left.!
So really,,,it's inconceivable that without any forensic tests,that the police could know------------as they claimed to know-----------that on the morning of the killings that the Anschutz,,,and the Anschutz alone,was the only weapon used in the murders.