Hi Frank, Welcome to the CRnG forum!
I didn't see any officer answer your question so I thought I would try. I could be wrong as I'm not a range officer in any capacity.
For some reason, there is no public accessible copy of our range rules online. I don't know why it's this way because if you visit the club, people are happy to hand you a printed copy of the rules.
I did a quick look of our range rules and found these two details about the rifle range that may help you:
Paper targets may be used on all Ranges. No glass, cans or breakable targets may
be used on the Rifle Range. (except during organized events).
Spinning or Knockdown targets may be used on the Rifle range. They must be
placed within 3’ of the berms.
I didn't see any specific mention of steel targets, so I would advise you to get an official clarification from an officer. Hopefully one will answer it here and I'm sure one or two will the next time they are online.
Regards, and welcome!