I had a question no one on the web could seem to find, so I fired off an E-mail to the good folks at Federal Cartridge Company and they say that their Federal Trophy Copper Ammunition needs at least 1800 fps to reliably expand. I asked specifically about their 200 gr. .338 federal loading but their reply seemed pretty universal.
I'm guessing out of my 17" Montucky it's coming out the barrel at about 2450. makes it a 300 yard cartridge.
So there you go interwebs google away!
