I have got this box of Speer Target 38 plastic cartridge cases. I think that all of the information that I have is clear in the photos except that one end flat has got; “8515 260C” written on it in black ink. The headstamp is SPEER at 12 0’clock and .38 at 6 o’clock. The box contains the full complement of 50 cases and with the box I also got a further 8 cases and 11 black plastic bullets. The bullets have a reduced diameter at one end to fit firmly inside the case and sit on the bullet shoulder. The primers can be pushed into the cases by hand. A few of the cases and bullets have been fired and are a little smoke blackened but I think that they are re-useable for quite a few times.
I have not heard of anyone in the UK who has used these plastic practice rounds, perhaps they were more popular in the USA. The pistols have been destroyed in the UK (except for those held by criminals) so these are just historical relics now.