When you're shooting groups, less pressure may help...but in a match situation, that's not going to be the answer.
You don't have to death grip with your strong hand though. Most of the recoil control comes from your weak hand pressure and leverage. Also, the more surface area/contact area you have on the gun, the less you actually have to squeeze, so work on proper grip technique and getting as much meat on the left side of the gun as possible.