That 140 grain Partition is what 2 out of 3 7x57s I owned had in common, a disinct preference. Seen it in others as well.
My 7x57 Ruger #1A is exactly the opposite; loves Nosler 120 gr. BTs, and 160 grain PTs, but absolutely hates the 140 gr. PT. I really wish it liked the 140, but it won't shoot it.
