All the Sniper matches I've shot in the last 2 years have banned sand bags. Bipod or shoot of your Rucksack is pretty much all you can do now, so I gave up my trusty sand bag in order to not got lulled into complacency with it, even for sighting in rifles.
Glad to hear your rifle is working out well for you DejaVu. Virtually every 700 I have, and others I have fired, have all been incredibly accurate for the price. Now all you need to do is get your comeups out to 1000 meters or so and it's off to the races.
My primary rifle is an Accuracy International stocked Rem 700 Police, with an aftermarket barrel and all the standard crapola done to it. On no wind days (rare in Alberta) I'll shoot 1/2 MOA 5 inch groups at 900 meters with it, and same whole out to 200 meters.
Remington is the only way to go IMHO for bang/buck.