Welcome to the form xxxxx.
With regard to the trigger, this may help you:
With regard to what accuracy to expect at 100 yards, it is hard to predict. Most Remington 700s with a little work and reloads will shot under 1 MOA (About 1" at 100 yards). But, that little work means bedding the action and floating the barrel as a minimum.
After that, the best first step is a trigger upgrade to at least a Timney if not a Timney Calvin Elite.
You will also find that YOUR PARTICULAR rifle may very well like one factory type cartridge over another. What twist does your barrel have? It will make a big difference when selecting ammo or reloading for it. Then what free bore in your chamber? If you don't know, you can check for both.