Found this round the back its a piece of plate steel 8mm thick.
It was shot at at 100m with my 6.5*55 with lowish powered privvi 139g factory soft points.
It was used for a talk I was to give which never came off.
This is a good reason for making sure you have a backstop and why landowners do'nt just want anybody on there land with a centre fire rifle even the 22,250 will penetrate right through with VMax
you can see it has bent the plate on the cross section photos.