I am using Norma .300 win mag brass. I have uniformed the primer pockets all the way meaning my redding uniforming tool is bottomed out. I am loading with federal 215m primers and seating with RCBS seater tool. I squeeze the tool all the way down like I have done in the past with all other calibers and brass. First of all the primer pockets seam very tight. But after my second reload on this brass and second time bottoming out my redding uniforming tool the primers stick protrude a couple thousands above the head of the casing. I am unable to get an accurate distance from base to ogive and also my ES is not as good as I would hope for where every other variable is uniform. I am not saying this is the cause of my large ES but it is a possibility. All I know is this is not right and have never experienced this in the past. What can I do about this? Is it possible my 215m primers are longer than normal. I have tried 215 and 215m primers and both protrude from the case.