The best of the 160gr RN is the Norma 156 gr Alaska next is the Lapua 156 gr Mega then the Hornady 160 RN Interlock, 2209 is a little fast burning for best velocity
2213 is better, ADI start load for 2209 is 40.00 max 43.00,
Trail Boss is a waste of time in a 6.5 unless you want subsonic loads
If you want to see how good 156/160 bullets are in a 6.5x55 buy a box of Norma factory ammo they really know how to load it properly
Bookmarks