i have used several varieties of russian 9mm ammo for years in any number of 9mm's. zero problems cept some appeared to be a little underpowered.
for plinking at close ranges not an issue.
i don't run guns hot enough to melt surface coatings.
I think i might have a 30.06 steel casing somewhere obtained from one of patton's WWII training centers on the arizona desert.
it's certainly not a new idea.
I watch a lot of battlefield recovery primarily in russia. some of the ammo found still looks pretty good.
