poltewerke
HONOURED MEMBER RIP
Dave, herewith, the photo of internal plug taken from 1952-3 mfg./ filled projectile assembled at ROF Swynnerton.  l checked the specific gravity of plug and its Alum./Dural. l must state though its best to stay away from breaking down items - those with even,  the slightest possibility of  containing an ''active'' composition. Regards, RonB.