6.5x284 270 wsm 7mmwsm? I was at our hunting expo yesterday and found the custom gun I am going to get. the three cartridges listed are what I am kicking around. I hunt where 100 yard shots are possible but 6 to 7 hundred yard shots are common. I was thinking of the 257 weatherby or the 270 weatherby but there not offered. I have been told the 6.5x284 would be great but its just not that fast. My 280 I have now is shooting 140 accubonds at 3095 fps now but its hot. reloader 19 is the only powder it likes and its cracking the cases after the third reload. 280 AI maybe????