Well you asked and so here goes.
Yes your right you can use other cal's for this but I've shot it on both the Ar- platform and the Remm bolt and it's well a hole lotta fun to shoot!!!With the 1-7 twist you can shoot up to 220 Grns and while there very slow @ 950-1050FPS the energy they hit with is nothing short of amazing. Do I run a suppresor, NO!!! Would I like one not really as most of my shooting is done way out west and so noise isn't a issue,were this comes into it's own is on property's 1-2 hours west of Brisbane that have been Cut to Crap like little 800-1200 acre blocks and bullet carry has become a issue.
Whilst I can down load a 308 or even a 6.5 for that matter the little Rem has come into it's own and will shoot 1/2"moa with 210 Bergers and for the most is a great scrub Gun.Not to mention it fits perfect on the handle bars of my Bike when chasing pigs out around St George way.It's not for everyone but I have read (not here) but on the interweb opinions voiced by Ignorant Assholes who have never owned or fired one and somehow think their opinions even Matter!!

It also works well with light 110-125 Grn V Max pills and gives you the option of a rifle with the recoil of a 223 but the hitting power of a much heavier pill.Do I like it Yes Sir

Would I recomend one yep but only if your a reloader as I also use my excess 223 brass for this rifle!!!! If you get the chance try one out I'm sure you'll love it

I've learned that pleasing everyone is impossible, but pissing everyone off is a piece of cake.