I have a 1/10" Douglas barrel on my 25-o6 and it shoots 115 & 120 grain NP's just fine and equally as well as the 100's.
Certainly the 1/9" isn't going to hurt anything with the heavy bullets, but I question the need; all factory, and most custom barrels are 1/10".......that has to tell you something.
I've been very happy with the performance of the NP's on deer and if changing I would try the Accubond 110's (just got some) and the 100 TSX.
I think, if a gun shoots them well, the TSX might be the very best for the 25-o6, but again, I've not tried them yet.
Also for load development & paper punching, the NBT's have worked well for me, both the 100's & the 115's.
RL22, H-4831SC & Norma MRP are my choices for powders; Fed. 210M primers.
MM
