if you read some of the older posts youd see that SA ammo uses a type of pine-tar almost in the seating of the bullet to the casing, it vaporizes and seals itself to the inside of your reciever, locking up the rollers......i made this mistake, took my 6 hours cleaning it, and shipping it back to JLD to make sure the rifle was in ok condition (turns out the charging handle was bent too/out of place slightly)...
in anycase, Wolf is good stuff to shoot in the PTR...dont worry about it, and the fact its steel cased is fine. I read a huge article on PTRs in some gun magazine awhile ago, cant remember the name offhand...they reviewed a standard green ptr w/out flash hider, and a collapsable stock one with flash hider, both were pictured....anyone know what im talkin about?
Wolf, Argentine, Portuguese, US, etc....all good.... no Paki, no Indian, no SA.....