I think the 284 win is an excellent choice.
I have been shooting the 284 win since 1983. Oldest is a Ruger Tang Safety. Had a SA model 700 for a while.
The SA Rem 700 used a Wyatt's mag box which lengthened the usable OAL to approx. 2.995".
http://wyattsoutdoor.com/index.php/cPath/1
IMO this cartridge in the Rem with the Wyatts box should use a 168 gr or lighter bullet. If the bullet is seated deeper than the neck shoulder junction it won't loose much performance. In my current rifle, a SA tang safety Ruger with a 23.5" barrel I get 2835 fps with the 168 Berger VLD and 51 gr of RL-17. OAL is 3.050" ( mag box has been lengthened) I could have worked up for more velocity but it is super accurate at this velocity so I stopped. Besides my 257 Weatherby is THE LR coues wt rifle don't need to push the 284 for that task. Did use the 284 to shoot a coues wt in 2015 @ 450 yds with the 168 VLD for nostalgic reasons. Rifle weighs 7 3/4 lbs and recoil is not an issue.
Best powders for this cartridge are either H4350 or RL-17. Have killed quite a few animals with this chambering over the years. Elk, coues wt, mule deer, javelina coyotes and jackrabbits. Used 100 gr X bullets, 120 nosler ballistic tips and 120 X bullets, 140 ballistic tips, accubonds and partitions, 150 bt and partitions, 160 partitions and the current bullet the 168 VLD.
If you decide to use the 284 win order a custom reamer to your specs. AND buy some superior Norma brass that was a special run for Bullets.com. It is priced for closeout at $77.70/100 here:
https://www.bullets.com/search?q=(category:Brass)+AND+(brand:Norma)
Information on the Norma brass:
http://bulletin.accurateshooter.com...6mm-dasher-and-284-win-brass-for-bullets-com/
If you are interested PM me and I'll share load data for other bullets with you.
Ross