PROBE—WHITE MEAT
I put the probe deep into the breast and as far from of any bone as possible. So, I insert it from the front, somewhat parallel to the spine (or where the spine was).
BTW, remove the wishbone, even if you’re roasting the bird whole. It makes it easier to slice the white meat when carving.
PROBE—DARK MEAT
In the thigh, parallel to the bone, in the middle of the thickest muscle group.
CAUTION
The temperature-sensing part of the probe is the sharp tip. Nevertheless, leave as little of the probe exposed to pit air as possible. The probe shank will heat up to your pit’s temperature and that heat will conduct down to the point to give you false higher readings. It can’t be avoided completely, so double check temperatures with an instant-read thermometer.
TARGET TEMPERATURES
Debatable.
IMO the USDA guidelines are (1) based on the temperature that instantly kills bacteria and (2) is about 5°F higher than necessary. So, for years I’ve used 160°F for white meat and 170°F for dark.
This year, I’m lowering my target temperatures based on my study of sous vide data. So, it will be 150°F for three minutes in the breast and dark meat will be 160°F for three minutes.