I recently purchased a Sauer 100 Field Shoot in 6.5 PRC, what I am wondering about is full length vs. neck size, which is better? I am finding there is so much to consider in this, it‘s a bit confusing. This along with powder selection and lack of supplies are aggravating. When I started reloading things were a lot simpler. When I reloaded for the 8mm Magnum I used IMR 4831 which did very well, however, now you have a multitude of powders for one specialty.