Here something to read on the 284 just look at the reloading data with 160gr bullet the rifle heavier than you want. If you can take the 284 with 24" long barrel almost 3000fps using 53.5gr powder vs 10gr or more powder for the 7WSM with 160gr bullet to gain 100fps more.
.284 Win Tactical Hunter
I've had two 300WSM build and one 270WSM and I looked at the 7WSM. I opt had the 280AI build also had 284 build and I got 280AI first month or so later got the 284. I always figure my favorite is the one I'm carrying but I have to say that 284 was one of the easiest to work a load up for and I use R-17 and the loading data from 6br article.
I could be wrong but think Mel Forbes Ultra Light Arm got his start using the 284 in Model 20 short action 5lb rifle.
I've never need more than 160gr 7mm bullet for elk. I never did shoot above 180gr in the 300WSM figure I'd lose capacity plus had a 30-338mag for that and my 280AI handle the 168gr and 180gr better if I want to hunt with them. Well good luck