I've shot them (NBTs) in .308, but prefer the old Sierra Gameking. They're (NBTs) a severe ballistic handicap for something like a 300WSM, which is the exact side effect of trying to cram such a fine (but long) case into a short action SAAMI spec that I was attempting to make light of in my original post. It's (300WSM, or any WSM for that matter) a cartridge that realizes huge gains in a Medium or Long action (or anything longer than 2.860" SAAMI COAL derived from Rem 700 SA length), which is the contradiction I was trying to point out in Macchina's original post about SAs and 300WSMs. Load a WSM out to 3.150, or better yet, 3.250, and you open up a bunch of powder capacity in the case. Not needed for 150s, but get into the ballistically efficient bullets at 180grs and up and it starts getting comical seating them to 2.860.
Coincidentally, my favorite cartridge for NBT use is also one that is handicapped severely by design COAL (6.5G in a AR mag). My little 16" Grendel ultralight loves the 120gr NBT, though I've been meaning to switch to the more ballistically friendly lightweight ELDMs or TMKs as my supplies of NBTs run low.
The underlying point I've attempted to make being, the "long action" (it isn't really that long) of a Tikka isn't much of a handicap, and you just might find yourself appreciating it even more if a barrel/cartridge swap enters the equation in the future. If going for an ultralight build, I can see the use of a dedicated action length (of a significantly lightened variety) with a matched for length cartridge and mag box, but that doesn't seem to be the case here.