I was given a fired 338 Lapua case into which an unusual brass projectile has been loaded. I haven’t pulled the projectile but there is 24.5mm protruding from the case.
The ‘drive bands’ measure ø8.45mm and the body ø8.25mm. The tip is ø6.2mm and is dished as shown in the second picture.
Does anyone know what this is? It looks too well made to be home cooked but I could be wrong.