Maybe not directly relevant, but, I don't use Kreg pocket hole screws with my jig. When using Kreg screws In soft woods, I get broken heads about 1 out of every 40-50 screws, in hard woods I get broken heads about 1 in every 10-15 screws. Extremely annoying, especially in narrow pieces where you may not have room to put in another pocket...
I'm now using Hillman Power Pro washer head screws for pocket holes. Haven't lost a head yet, and they're star drive which work so much better for me.
except where I want maximum strength, then I use USP TimberLok Structural screws.
Top to bottom: Hillman Power Pro washer head screw, Kreg coated pocket hole screw, and USP TimberLok Structural screw.
For my custom sized screened door, which I built the frame and pull handle out of a single piece of 6/4 x 10 3/4" x 10' Poplar (cut down using my bandsaw, and a circular saw), I used pocket holes, and 2 3/4" USP TimberLok screws. I started out with Kreg hardwood screws, but the heads kept popping off before I could close the gaps. Moved to the TimberLok's and no problems. It's a horrible picture, and the door is ready to be taken down, lightly sanded, and re-painted, but: