Jon, As you'll see in the following diagrams, straight up the legs on a broadside turkey really doesn't put you into the "hips"(pelvis).
The pelvis sits back and high because the femur(thigh bone) angles back attaching the pelvis and drumstick.
Straight up the leg, at the right hight, is the place to hit though.
A hit there will put you just above or thru the drumstick/thigh junction(depending on the body angle, flat or more upright. Check out the difference in the two diagrams) and through the back of the vitals...hopefully breaking some bone so the turkey can't run or fly, and dying quickly with the bh through the vitals.
A little low and you still get the drumsticks, back a little and you break the femur, forward and you get solid heart/lung, and high you get the spine.
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Another good diagram that shows the bone structure really well...
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Just remember on an angled shot you just have to adjust front or back depending on quartering to or away....and most of all...."high they die, low they go"!!