Rule303 - thanks for the response & acknowledgement of Finn's article. I don't know and cannot put forth my own experience between the two, although I figure he was using factory ammo, so something less than 2,340fps with 286's and those should not compare with either 2,640fps 270's nor 2,500+ fps for some 300's from the .375. That just doesn't make sense, although the 9.3 mm 286's are close to .375 300's, than 270's.