Driving

Whenever I go play a round it always takes atleast 5 holes to get my drives set right and throw how I should be throwing. Before I throw, like most people, I choose my disc, picture my throw then I start my x step and throw the disc. Then it goes about 175 feet and bombs left. What the heck I did everything like I was suppose to, so I thought. When I do get my throw right I throw well, in the range of 275-300 feet. I just need to practice more on my form and do it the same way everything until it becomes natural.