Maybe I haven't looked in the right places, but the threads I have dug through are all over the place on the issue. Some say Mag primers are the only way to go. Others say to go with standard primers because they only lose 10-20 fps and keep pressures lower. Another thing I've read is that mag primers keep the ES tighter. I just bought my first press, and I will be using Longshot, 800-X, Blue Dot and some others down the road. I only plan on loading for 200gr/180gr/135gr for a while, so what's the current consensus?