Bench Press Grip: Slightly Wider Feels Easier?

Hello,

i just have a short question regarding the grip width in the bench press.
During a maximal press e.g 95% + my grip gets automatically tighter and my sticking point is in mid range. When I grip 1 cm wider(or a finger or 2) with lighter weight e.g 80% i get the feeling like i can press it very easy through the lowest and mid point. Is this because of pecs activity?
Sorry for my English

thanks in advance

It probably has more to do with it just being a lighter weight so its harder to determine your sticking point. I wouldnt think such a small adjustment in grip would be a huge difference maker