This is a very loaded question. Remington has used several different triggers in the 700. More information would be needed.
Only 2.
The original trigger was designed, and 1st used in 1946. It immediately started causing problems with discharges and no trigger pull. The engineer who designed the gun, and trigger, found the problem with early guns that he pulled off the assembly line and tested. He drew up plans for a new trigger in 1946 and resubmitted them again in 1948. Remington management declined to make the change because it would add 5 cents to the cost of the rifles.
The same trigger was used from 1946 to October 2006 in every Remington bolt rifle except the 788. After over 100 lawsuits and about 2 dozen deaths Remington finally adopted the modified design.
The problem is that the original design used a floating trigger connector between the trigger and sear. The connector can freely move as the gun is handed. If it ends up in just the wrong spot the sear does not fully engage. As the gun is handled the sear releases, but the safety is holding back the firing pin. When the operator moves the safety to the "FIRE" position the gun fires with no trigger pull. That is the most common way it happens, but occasionally the sear will release as you begin to lift the bolt handle with the safety in the "FIRE" position.
The original safety on the 700, 721, 722, 725, 600 series, and 7 series of rifles locked the bolt down when on "SAFE" and required you to move the safety to the "FIRE" position in order to unchamber a round. In an effort to prevent discharges the safety was redesigned in the 1980's to allow the bolt to be opened with the safety in the "SAFE" position. This did go a long way towards reducing the issue but did not address the real problem.
Remington has never admitted a problem but did agree as part of a Class Action lawsuit about 10-12 years ago to replace the trigger on any 1946-2006 rifle at no charge if you send the rifle to them. This has never been widely advertised and I have no idea if the new ownership will still honor that. Most people simply replace the triggers themselves. It is a $100 DIY project that takes about 15 minutes.
The new trigger introduced with 2007 models also had issues. The trigger is a solid design, but during assembly adhesive somehow got into the trigger groups on some rifles made 2007-2014. That caused issues and there was a recall on those rifles. The same trigger is still in use and those made 2014-present seem to work fine.