In testing plastic cases in NEF and 87 I get
good case life with RE-7 loads. In 87 a Rem case
fired 5 times and it looks good. In NEf a Federal case
fired 6 times and looks good. Of course you can fire them
once or twice and throw away at 3-5 cents each.
I got long heavy barrel ordered for 87 levergun,
and then we will be able to put zip to the slugs.Ed