my sporter barreled SPS 17FB will do better than that at 300 yards!!!
Has it ever shot good? I think you may have a bedding issue, or a bad or dirty barrel. Have you tried cleaning it, and I mean clean? How hard is it to clean up? What does it look like when you look down a clean barrel? Do you see "chatter" marks with your naked eye?
I'd get yourself a can of Outers foaming bore cleaner, shoot it down the barrel (from action out the muzzle), let it stand in a corner, muzzle down on a rag and see what happens. If after a half hour, the crud coming out is a little blue, chances are it's not copper fouling. If it's a LOT blue, hit her again, then re-check. You may need to scrub with a NYLON brush after you shoot the foam in, before you patch out. Get it good and clean, then take it out and try it again.
If that doesn't help and you don't see "chatter marks", it's probably not a fouled barrel. It may be your bedding, or something binding in the stock. Take the action out of the stock and make sure it's not "rubbing" at any one spot (like the mag box). Make sure the bolt isn't touching the stock when closed. Re-torque the action screws to about 45 INCH/pounds. Loosen both, then re-tighten the front first, just a little more than snug, then the rear, just snug.
These are a few quick and easy things to check before you go messing with things and void your warranty.
I had a 700 in 300 Win mag that wouldn't do better than 3". Looking down the barrel, you could definitely see chatter marks, rifling was not smooth, and it would copper foul badly. Ended up sending it back to Rem. after I did all of the above. Not sure what they did (lapped barrel maybe?) but I got the same gun/barrel back, without any chatter marks in it. It shoots bugholes now. If you can't figure it out, you can always sell it or send it back to Rem for them to take a look at it.
Good luck
Charlie