every time i try to make a peaceful jeffrey sling i get the pouch to thin? can someone help me fix this? heres a pic of one i just did.

Hi, and welcome, noah0928;
    First, have you tried using one of these very thin pouched pj slings?  I often make pjs with very thin pouches on purpose because they offer less air resistance and consequently shoot farther.  Plus there's no problem with the projectile slipping out premature as long as I balance it perpendicular to the pouch when loading.
   With that in mind, sometimes a wider pouch is desired anyway.  The easiest way is to just double your weaving cord.  I often do this when using my cheap jute twine as the weaving cord because it has a very thin diameter.    Below is a sling made in that manner.  As long as your weaving cord isn't too thick to start with, it comes out just fine. 
   Another solution is to change your pj, which is a five strand sheep shank sling, to a seven strand sheep shank sling, like my Cobra.  You're just making two more loops when initially making the knot that supports the pouch:
http://slinging.org/forum/YaBB.pl?num=1257543044
If you wish you can skip the changes in the weaving that make the "fangs" for the Cobra, and make just a regular seven strand sheep shank. 
    I hope that this is some help to you.  Good luck and be safe.
Rat Man

 As you're weaving, pull on the outside strands. (the strings that make up the "frame" of the pouch)  Pull them nice and tight and you'll get a cupped shape to your pouch like the one in the picture above.  You'll stop dropping projectiles, regardless of how thin the pouch is.  Below is a picture of a TS3, or three strand sheep shank sling.  Say that three times fast.  As skinny as that pouch is, it won't drop projectiles because the two outside strands were pulled up tightly while the pouch was being woven.  That's what keeps it in that "U" shape.  You've made a good choice, btw.  The pj is one of the best slings, IMO.