.257 Roberts. New and once fired Remington brass and CCI 200 primers. IMR 4320 and 100 gr. Sierra SPBTs. Doesn't matter what charge I put in them. Low end all the way to just under max the primers back out the same in all of them. Haven't actually measured but just by looking at them they look the same. Accuracy is very nice with this load at 38.5 grains. Why would the primers move like this? They didn't with the 40 rounds of Hornady factory loads I've put through it. Will be trying WLR primers next.
Is it even a problem if everything else is working right?