yeah it's a TSX, have a bunch left from my 460 S&W days so load them long for the Ruger #1 and my rebarreled 700.
My 45 Raptor (rimless 460 s&w) suffers from a lack of neck tension with Barnes bullets and would get a little jump when I had it in a AR10 platform. The Hornady 460 sizer leaves the ID right at .451 so what I do with it is run the case up a 454 sizer die about 1/2" which makes the ID .447. I skip the expander die as the Barnes have a decent size base radius, light chamfer the case and seat. I still taper crimp to even out the mouth. I don't have the AR10 no more, just a bolt gun, but I do think it helps hold down the 15fps ES.
If I get a chance this weekend, I'll try the same thing on a 450 case. Might be adding another step to the process, but if it works I think it'd be worth it.