At that kind of yardage, you'll get plenty of "wow factor" with a 6-284 slinging 70ish grainers, that's for sure.
I don't know that I'd call my 6-284 a "calling rifle" because it's no light weight but it shoots the 75gr Vmax realllly well at 3650fps and gives me plenty of wow factor.
Specs to my 6-284 are, Rem SA 700, Lilja 26in fluted #7 1-12tw, McM A5 Desert Camo, Jewel trigger, and NF NXS 3.5-15x50 sitting on top. I've read where some complain about feeding issues but my setup uses the regular Rem BDL bottom metal and I've never had a single feeding issue. I run mine suppressed with a SAS Barricade and not only is it very quiet but it will put them into the .3's on a regular basis.
You'll get some to debate whether a long action is better suited for the 284 than is a short action but I think it depends on what you plan on doing with it. For me, I knew I'd be shooting bullets no heavier than 80 grains so a short action built 6-284 for my use works great, but if I had a fast twist barrel to shoot the high BC 105's and wanted to get ever last ounce of velocity I could squeeze out of it, well, a long action would probably be the better choice. I also have a 6.5-284 with a fast twist that shoots the 140's and it's built on a long action Rem 700.
Not trying to talk you out of what you want but considering the yardage cap you've set for yourself, just a straight 243 Win, 6BR, or 6x47 Lapua would be a better choice for you. They won't shoot quite as fast but they all offer excellent brass and if weight is of any concern or you want to keep the barrel in that 20-24in. range, they'd likely still do everything you want. Something to think about.