Re: hunting balistics
I like the Hornady 139gr SST Superformance loading in .280 Rem. Plenty of velocity to well out beyond the distances you require; it shoots flat, accurate, and hits hard. Mine runs in a Ruger MKI; and I'm suspecting it'll do quite nicely out of the current MKII. To my view, the most practical 7mm out there; I'd try to ensure it got every bit of a good 24" sporter weight barrel.
Edited to add:
After scoping rhe Sturm Ruger site, I note they have no current .280 offerings. I have little doubt there are plenty out there used. Factory chamberings currently include 270 Win (22" barrels only) which is far more available as ammo. I have two MKI's in .280.
Checking the Hornady site, they have a
130gr SST Superformance load in .270 that has an MV of 3200fps and 6-7MOA of drop and 1400+Ft/LB of energy at 500yd from a 200yd zero. Hornady has a bunch of other
270 offerings as well.
My personal experience with Ruger 77's is that they are built solid, perform flawlessly, and I consider them to be the Cadillacs of the rifle market. IMHO, with factory M77 MKII's available, little sense to having a rifle built, and that goes for Savages, too.
Savage has no less than 31 offerings in .270, including their 111 Lightweight Hunter, which runs 5.5lb with a 20" barrel. The Superformance load starts fast enough to make a little velocity sacrifice to a shorter barrel and still git 'er done.
This 111 Lightweight Hunter features a specially lightened action, fluted bolt, minimum weight 20" sporter barrel, lightened/vented pillar bedded walnut stock, D/M, Accu-Trigger, and an MSRP at $875; same gun/same price in .30-'06, .308, and .260, too.
'Nuff said.
Greg