I was trying to fire form Dasher brass from Lapua 6 br. new brass and was loosing 9 out of 10 for a split shoulder. I called the rep. and he said send in the ones with the split shoulders, so what good is an other lot mixed with what formed. so I just annealed them and see what happened a guess the rest of the 1000 never split a shoulder or a neck. They may look good but it is cheap to anneal them first and cut your loses...... but it won't fix the loose primer pockets or the ones that look like a giant pop rivet ...... jim