This sounds like all to common of an issue with the 700's. I went through the same thing. Bought a 243 varmint hoping to develop it into an F Class rifle two years ago. It shot 2.5 MOA with factory ammo out of the box. The question that went through my head was, what kind of varmints do they expect you to hunt with this? Wild horses at a limit of 200 yards?
Over a period of 6 months I changed the stock, bedded it, replace the trigger with a Timney, lapped the barrel, reworked the crown and tried every combination of powder, bullet, charge and primer I could using Forester competition dies to reload with. Got it to shoot a little under 1 MOA with some loads. Not good enough for F Class. Sent a nasty email to Remington and they wanted to see the rifle. I sent it to them. Then sent it back with a note saying they lapped the barrel and a test target shot at 100 yards. The group in the test target was 1.5 MOA... Sent that piece of garbage down the road and I'll never buy another Remington rifle. Now I buy Savage and every rifle I've bought will shoot 1/2 MOA or better out of the box. 1/4 MOA in the case of my LRP 6.5 Creedmoor.
WOW! That's too bad, looks like they missed an opportunity for a repeat customer. A happy customer is repeat customer.