That is stupid, but most hunting land in Oregon isn't BLM. The majority is one of the following:
1) State land categorized as either "Oregon Board of Forestry Lands", "Division of State Land Admin. by Dept. of Forestry", or State Forests, which are usually one of the previous two.
2) National forest (including Wilderness areas).
3) Private timber companies that have open gates, or allow hunting behind their closed gates eg, Weyerhaeuser, Starker, Forest Capital, , Hampton, etc etc etc. Sometimes these companies will be "checkerboarded" with BLM land though.
However, just because BLM drafted some new regulations that they may or may not actually want to implement, doesn't mean that those new regulations will happen. It would take a lot for that to happen.
Also, coming from the standpoint of someone who uses public land to target practice, I can see where these people that want those new regulations are coming from. I don't believe it's as much an issue of the shooting itself, but more of an issue with the problems associated with it, like discarded ammo boxes, brass, targets, and other trash that 10% of people don't clean up when they are done. It's the bad practices of the minority that give the majority the bad name in some people's eyes. All of the private timberland around Valsetz is closed to target shooting now because people completely abused the privilege and trashed it.
Also, another note, what I said about distribution of land is coming from my experience of the northern half of the coast range and the cascades. I'm not totally sure about the rest of the state, but I'm pretty sure that what I said generally holds true across the board. I'll look in to it and see if I can find real numbers.