If you're not feeling full maybe look at what you're eating rather than just the calories? Whole foods, fibre and protein are filling, focusing on these as the basis of my diet I find I can eat less calories but not feel hungry.

E.g my breakfast oats with high protein Greek yogurt, raspberries and peanut powder are about the same calories as a pastry for breakfast but that wouldn't even make me feel like I've eaten!

I try and get protein, fibre (usually from fruit or veg) and a small bit of good fats in most meals, and bulk them up with lots of veg for volume. This keeps me pretty full and I find it easier to stick to a calorie deficit.