Well the 308 is a great way to start shooting long range especialy if you don't have all your reloading stuff setup yep because their is alot of good match quality ammo out their. You SPS would benifit ALOT from a bedding job and having the barrel floated and the trigger work if that hasen't been done , even though the barrel is thin and short that doesen't mean that you can shoot long shaot with it probably just not as many in a row. Accuracy or should I say consistant accuracy is a main factor is making shots at long range , if your gunn will hold 1 moa out to say 600yds then you have a gun thats would make a good 600yd deer gun so long as you can shoot that type group all the time. Generaly with a little trigger work , bedding job that releave the barrel and somtimes a fresh crown you can get a factory Rem down below the 1 moa mark and somtimes around the 1/2 moa mark. If you have the funds I would invest in a better stock strait off , you can get a HS Precision for about $250 and that would be a great adition to the LR rig you can buld on your existing 308
As for your Savage , well their you have a great base for a long range gun , good heavy stabill stock a good action to work from and they are generaly very accurate for factory rifles , the twist in that gun should alow you to shoot 55gr bullet pretty well and with the speed the 22-250 offers it will make a good 500yd varmint gun , Best part is that you can change toi a differany cliber realy easy and don't have to wait for long turn around time from a smith.
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