Back to the 270, even if a guy wanted to launch a 90 or 100 grainer in it, it's still blowing by a 25.
Not if you are loading them to the same pressure.
The 25-06 with the 75gr hp, (lightest regular cup and core) using IMR4064 will hit 3700 fps at book recipes. With a 120gr, 3000 fps is doable with several powders, again at book recipes.
The 270W using 90gr hp, max book is barely over 3500 fps. With 130s, 3100fps but at 2k higher pressure. With 150s it's pedestrian.
There isn't any magic in the 270 Win.
