Re: 250 VS 300 Berger .338?
I have shot the 250's.
I stepped down from the 300's to the 250's because like LayinItDown mentioned, 300's don't fit into a factory 700 mag (this is for the .338 RUM of course).
They shot VERY well out to 1000 yards. They had a fair bit less drop and almost the same wind drift as the 300's. I was happy with them. I have not shot them past the 1000 yard mark yet, and probably wont. the 300's really pull away from the 250's at that point... more in energy than wind, and so for me, the verdict is...
250's under 1k
300's over 1k.
the 250's also had less felt recoil by... well, enough to notice.
I just bought a Wyatt`s mag well for it so I can fit the 300`s, but might stay with the 250`s just because I can.