M y First Axis XP in 243

[GaCop]

There's an old Dr. adage that a patient with a broken leg can also have measles. You might have two problems, or so much headspace that when it does fire you get pierced primers (excessive chamber pressure). Flat primers is also an indication of overpressure.

Try a 0.025" jump. But that won't solve light strikes.


IMR 4461? Don't find that as a thing

LOL! That should be 4166!