Well I tried loading some 62gr up for my 223.
Turns out i must have a dud batch. A bunch of them have a rough finish and when seated in the case are loose and will spin easily in the neck, but they wont pull back out.
I mic'd them and it shows they are 0.001" wider at the base (top of boattail) than at their seated point.
When i checked seating depth i had grabbed a "good one". When seating on powder the first was good, the next 5 were duds. I felt them drop past the neck and then go loose. Pretty fckn disappointed as i was wanting to go shoot them.
I tried removing a lee collet neck die mandrel and squishing them tight, bit no luck.
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