I've recently gotten interested in long distance shooting (out to 1000 yards) - principally target shooting (not hunting at those ranges). My shooting experience to date has been pistols and semi-auto rifle range sessions with infrequent hunting trips. Distance wise, I can reach out to 300 yds with good consistency and accuracy.
My current setup is a Remington 700 SPS AAC-SD 20" 308 barrel mounted in a Magpul Hunter 700 stock with mag well upgrade, Timney trigger, Badger 20* rail, Badger knob, Primary Arms MIL 4-14x44 FFP scope (waiting for the Vortex AMG), Atlas PSR bipod, Silencerco brake and Omega silencer, and 3000 rounds of 168gr FGMM. Rifle shoots 3/4" MOA at 100yds. Haven't felt the need to accurize it yet but that may change.
With that much brass on hand (and wanting to be more accurate), I plan to handload but I principally buy over the counter for now. A thread topic for another day.
I also do a LOT of practice on a 10/22 (KIDD trigger, VQ barrel, Magpul X22 stock) then transfer those skills to the R700. It's a slow methodical process but rather enjoyable (and conserves ammo/$). I'm trying to do it right.
I'm a big believer in backup gear especially as the long distance ranges are hours from where I live. The easy answer would be to get the exact same gun (parts interchangeability is a big bonus). However I've read that 308 ballistics beyond 600 yds perform sub-par relative calibers such as 6.5 Creedmoor.
So my question is: if I'm buying a beginner long distance rifle as a spare, should I get another 308 rifle to backup my R700? Or should I think about getting a rifle in a caliber better suited to distance shooting such as 6.5 Creedmoor? I've been looking at the Ruger Precision Rifle (enhanced) and it seems like a good value. I could buy it in 308 and use it as a backup to my R700 (or vice versa) and then (easily) upgrade the barrel to a match grade 6.5 Creedmoor when I'm ready for longer ranges (I'd also convert my R700 so as to have a spare). I would do the gunsmithing work myself. Other than a SCAR17, I don't have any other 308 investments so switching to 6.5 Creedmoor wouldn't be an issue. Or should I just stick with 308?
Apologies for the long post!