Dave Scovill wrote about how when they were experimenting with the TSX, they turned grooves on the blue ones. The result was very “fetching”.
The ones I posted have a lead core, so not quite the same thing as the TSX, but more like the newer match burners. A further note, I don't see any anomalies in the rifling after shooting these either. The first gen TSX without the groves had all kinds of problems. Again, don't know if you can compare those problems to a lead cored bullet?
I have never had a problem with a TSX.
X bullets I had a problem with one. 45 gn IIRC in a 22-250 Should have stabilized. They did. Into about 14 inch groups at 100. But point on. Those 45s were the only ones I"ve never been able to get to shoot well enough for intended purposes.
Once they put grooves in there was never a doubt.
Off topic, but not to far since talking different bullets. I still have a box or less of these pointy turned 224 bullets. Heavy IIRC for 223 in service or match rifle. Solid bronze? Brass? Pointed enough to draw blood. Only played with a few tests and was not that impressed. Some kind of labs up to TN/KY maybe. They are pretty cool looking at least. I'd post a picture but I don't have a clue how to do that these days and gave up mostly on photo bucket etc... IE have no photo server kind of thing anymore.