I've shot at targetmaster, mostly .22lr (ruger mkIII) and .38 spl (s&w 10 & 19). I often wondered why they didn't allow wwb, but since my mkIII hates winchester ammo, and I already had a bunch of other brand .38spl I didn't have an issue with the restriction. As I replaced ammo, I simply bought non-wwb. (their restrictions used to say "no smokey reloads" - looks like they've dropped that one.)
Unenforceable rules weaken the good and reasonable ones.
Are they going to check every round's headstamp?
When you pay for your range time, they'll ask to see your ammo, except for .22lr. They don't seem to care what .22lr you shoot. They look at the box and say ok or not. I suppose you could sneak other stuff into your box - I've only had them check the actual bullets (yes, bullets) once to see if they were jacketed (I guess he didn't recognize the brand). They're system seems to be one of "check what you don't recognize but otherwise assume the customer is honest."
There are no restrictions on targets or backings. Bring your own or buy from them. No silly rules about not shooting "human" targets (ones i see a lot are generic arab terrorist, osama bin laden with a gun, and man with a hostage.)
Last time I went, I didn't want to use up my dwindling supply of .38spl so I asked what they had cheap for plinking. The guy behind the counter took a box of remmington from a stack of "range ammo." I was surprised at how reasonably priced it was. Another counter guy then asked me what kind of gun I was shooting. When I told him, he said - wait, use this instead, it's better for your gun. It was the same price. I thought that was a nice bit of knowledgeable service at their end. I think I'm going to go again just to buy up more cheap range ammo than I'll actually shoot lol.
One thing I've never gotten from them is "attitude." They don't mind answering newbie questions, they don't treat you like they're demigods and you're a peon just because you're on the wrong side of the counter. And there are a lot of range members - not everyone shooting is a beginner.
No doubt there are bigger, better, newer, cleaner, more professional ranges, but IMHO, Target master is fine. I'll miss it when I'm no longer making work-related trips to PA.