brake problem

[vcrazy8]

My Truck dont stop very well when I hit my brakes hard. The pedel doesn't travel far but no matter how hard you push it doesent stop good at all. The pedel feels real hard to push. It has power brakes and it has slowly been getting worse shoes and pads look good and are adjusted right. It even does it when cold. Kinda feels like brakes do when they are overheated. Normal breaking feels normal it only does it when I push the pedel hard..Could it be the Aoto Zonr performance carbon metalic brake pads? thanks