Re: 6.5-284 vs. 264 Win Mag
The 264 STW will do more than either. The 264 win mag next. I like my 264 gibbs next which is all you can get out of a blown out "06 case and virtually duplicates the 264 win mag. The 6.5-06 imp is close to the gibbs and a very good cartridge also. The 6.5-284 will come in behind all these in velocity. So as a long range hunting cartridge it would give you the least killing power.
Predictions are difficult, especially when they involve the future