In region 10, I've learned that in any of the bear onslaught hunts, if you shoot their feet, they will get gimpy, and you can pick any shot easily. It's only 3 kills, but you can get three necks every time. Also on the region 10 elk hunt, I wait for some to cut across and run in front of me. With an assault rifle (without using scope) you can pick the necks pretty easily, usually about 6 of 8.
since necks are my last remaining bounty, I found out that the best neck shots come from bisons, so u can shoot in region 10, there are two bison hunts (6 and 8 bisons). Aim for the top of the hump of the bison, preferably when the animal is heading in your direction. If you are accurate enough you can get 80-100 percent of the shots right in the hump which seems to be considered the bison's neck
Whatever you do it gets boring eventually, so maybe try for a change of pace. Use one of the bows, then many of the bears, hyenas, lions, wolves etc (at the right level) are on for that neck shot. Because of the 'suppression' you get the time to wait for a good shot. I found it a nice change from the running animals.
Comments
My best was region 6 on deer hunt.