Took some soldiers out to shot these old rifles today. SMLE (Enfield 1914), P14* (Remington 1917) and No.4 MkI* (Longbranch 1944).
Out of 12 rounds, 6 had sterile head stamps other 6 had this pattern around it.
Out of those 6, 3 were misfires and struck 2 more times for no ignition. Pulled the bullets and powder was the old stick cordite.