In the 6 XC and 6.5 Creedmoor, I'm Happy with,... IMR 4350, H-4350, & N150 and I Use, a LOT of StaBall 65 !
I've found GREAT Accuracy with StaBall 65 ( But I'm NOT,.. a BR "Competitor" ).
5 shot Group's ( depending, on Bullet ) into the Sub 3's and 4's down to, the Low 2's in my Semi custom 6 XC and 3's to 1/2 MOA, in my Modified 24" Tikka, 6.5 Creed.,.. ARE Fine for, L R Steel Plates and Varmints.
I Have also used some 4895 with, the Lighter Bullets, in Both Cart's.
40.7 grs of StaBall w/ F210M prs and a Lightly Jammed, 107 gr. SMK gets Me into the LOW 2's for, 5 shots !
"Pet Load" for the 6.5 Creed,.. 43.3 grs of StaBall 65, w/ 130 gr ELD-M's @ 2,850 fps and I get "CloverLeaf's",..
And almost, NO Recoil from, my Braked, 24" Tikka ! ( A real pleasure to, Shoot,.. a LOT !! )
I Have NOT Had, any Luck with, N-160, in the either Cartridge so, I AGREE w/ Fuj and I would, "Skip", It !
It ( N-160 ) Did shoot great, in our .243 Win Tikka with, 87 grain H-VLD's and V-Maxes, tho !
N-560 "Might work" with, the Heaviest, 6mm Bullets, in the 6 XC,.. the 110 to 115's ( Try, a pound of,.. it )