I agree that RCBS will probably do something to address your problem if you were to call them. Even so -- that's no reason not to complain on a discussion forum. This is a legitimate beef and we discuss this sort of thing here, so I see no issue with your being annoyed and sharing that in a thread.
I have a Lee Funnel. Well, actually, they are SO low in cost that I have 3 of them, but I haven't found a reason to even open the package on the other two. Hell, I think I gave one of them away. Anyhow, if you snag a Lee funnel, it'll work fine for .223 Rem.
Now, you folks with the pitchforks -- RCBS may be on your hit list, but Smart Reloader is where the money is. Those SOBs should be burned downed to the ground and their ashes stomped on.