Grouse45
100fps is a big difference at three, four, five hundred yards in my opinion. That would even change the wind drift as well.
I disagree somewhat.... I have to go back to my centerfire reloading days to reach what i am proposing... but, anyway very often the maximum load in a 300 Win Mag or even the 270 with a particular bullet is not the most accurate... it may be going a bit faster and it will have a bit more energy, but more often than not the most accurate loads are not the max loads available for each powder type.