Of all those resume's you sent out, how many were followed up with a phone call to the person that could hire you?
How many of those phone calls were followed up with a simple thank you note for the person taking the time to talk to you?
How many of those thank you notes were followed up with phone calls on a regular basis to develop a relationship with the person who could help you or provide a lead on another company that could hire you?
You have X number of years experience, have a CWI and sent a resume. You and 1000 other people.
Breaking in is a numbers and luck game. You make enough contacts and you will get lucky.
Along with dbigkahunna's excellent suggestions, I also would like to offer this... If the job is advertised then the odds are already stacked against you since there will be dozens or hundreds of applicants, of which most will possibly have more experience than you. Reach not for the "low hanging fruit" but go to the tree. Do some research and find shops, inspection companies or contractors, then contact them. 200 resumes??? that aint nothing. If I am nearing the end of a project or out of work, I send maybe 4-10 cold calls and an additional 4-10 responses to advertised jobs a day. Now what happens is that I probably get at best a 1% response on returns. Often months later! The majority of offers occur AFTER I'm employed. Many job postings are research and resume banking so that they can prove to a client they have the staffing capabilities for a contract.
Don't be picky and apply for jobs you don't want. Sometimes they have other gigs on the back burner.
Yes it is a waiting game.
One last thing. Keep your basic CV/Resume short but concise. AND customize it to each individual job posting if necessary.
Keep at it and best of luck to you.