I've seen 3100 easily, in my .300 Win mag, with 26" barrel. I've actually been a good deal higher, but the cases were expanding too much.
.300 Wby factory ammo with 165gr NBT's ran 3425 fps, out of my 26" barreled Mark V Ultralight. Claimed velocity is only 3350. Factory claimed velocity with 180's is 3250; if the same trend holds, the low 3300's may be possible.
Assuming Bullwhacker judges "max" in his .300 Wby the same as he judges it in his .300 Win mag, I would not dismiss his loads as excessive without seeing them myself.
