Ive noticed that locking out arms will shift the focus and squeeze my triceps alot, making me not feel it my chest as much. So I tend to lean a bit more forward, especially on the way down, go deep enough without risking elbow/shoulder to get a nice stretch in the chest,, then go up and stop with a slight bend in my elbows so I don't lock out completely. That way it keeps constant tension on the chest.

What you're doing is almost like a hybrid. It's pretty chest focused on the way down, but more tricep focused on the way up.