HM, I never realized how important the correct primer is for a particular app. until I started my "muzzleloading sabbatical" years ago. Until then I figured a primer was a primer, but wow, what a mistake! When I decided I wanted to get a black powder gun, I had no one to "help" steer me around, so I did just what I always did, dove right in to the big ML pond and started experimenting. After about a metric ton of different bullets, primers and powders, I finally got my gun to shoot about a 5" group at 100yds, and back then not knowing how super accurate a ml could be, figured that was pretty good. Then I read somewhere about 777 primers, and I was using 777 pellets at the time. So I went and got some of them, shot my gun with them, and low and behold my "good" 5" group went to 1" or sometimes a hair less. What an awakening!! But yeah, the correct or incorrect primer can totally make or break the whole deal. Well, we've got a 4 day and then a 3 day doe-only season coming up shortly here in Illinois, last chance to use a gun for deer. I'm not holding my breath, the few deer I'm seeing where I hunt will NOT even cross an open field in daylight, that's how spooked they are. But like I've always maintained, sittin' in a tree down there is still WAY BETTER than watching Jerry Springer!!! Hope you make out OK with your neck problem, keep us in that loop please!!