Well, I called T/C and I have to say, I threw them for a curve. I do not think they really understood the question. The lady finally reported (after talking to two or so people, the last one a "gunsmith from the Custom Shop" that the bore is: ".2190 - .2210 or the same as the .223"
I am skeptical. It took too much time and energy to get the "answer". I also do not understand how or why years of published data is now "wrong"
? This doesn't make sense.
So, I guess I'll buy some .224 Hornet bullets and give them a try.
Bob