I'm not sure that'll be a good idea. Personally, I would be a bit hesitant to do so based on the information you provided. Here's my rationale:
You cannot claim the 600 points unless you've received PNP or valid job offer? If it is that you do have the PNP, then for sure go right ahead!
If not, suppose you do apply now with the score you noted (838) and CIC offers you an ITA in the next draw (which some speculate could be as early as tonight), it's unlikely that CIC would consider your 838 points for PR because a valid job offer MUST be accompanied by a positive LMIA - a job letter alone will not suffice. Had it been that simple, all those on LMIA exempt work permits (such as PGWP) would be able to claim the 600 points and the current related fuss surrounding that issue would be avoided. Anyways, I digress. My point is that if you claim 838 without LMIA/PNP, there would be grave consequences cos it's possible that CIC may interpret this as a misrepresentation of information. Furthermore, if you're lucky in the sense that your employer is willing to apply for the LMIA, I suggest you wait until you have the results before claiming these 600 points, because that process can take months. Many draws could be held while you wait for the LMIA results. Also, applying for the LMIA is a headache, but it does not guarantee you will receive favourable results. Only a minority of the applications are approved. Therefore, even after going through this entire process, you may find that you do not qualify for the 600 pts.
Also, are you considering applying under CEC or FSW? The reason I'm asking this is because to be eligible for CEC, you must have worked for a minimum of 1 year. Therefore, if this was your intention, you may not qualify for the CEC stream until you hit the 1 year mark. On the other hand, if you qualify for FSW you may do this now, providing that you have the PNP or LMIA to claim the 838.