neck bushing

I'm bumping back the shoulder on my 224 Valkyrie once-fired bass by .004" in a Redding FB bushing die, and bringing down the neck with a bushing to a neck tension of .003". However, keeping the shoulder bump to .004", I'm seeing the neck get sized only about halfway. I assume this is not ideal...

Looking for .307 and .308 diameter Redding neck bushings, either Ti-Ni or steel. I can get the .307 but if someone has both that would work.