I've used the flat base 100 gr Hornady for years in a 6mm. But they don't make them anymore so I've been dabbling with others. My gun (a Ruger tanger from around 1980) did not like the 95 gr NBT. I got patterns, not groups. So I moved on to play with the Barnes 80 gr TTSX. It's showing some real promise in the accuracy department.
Dale
With that profile, I'd be checking out NPT's.
DF