ORIGINAL: Hotburn76
The split necks was a sign a guy at work told me to watch for. But from what you guys are saying this is common, and a sign of brass life?
Split necks are common failure for straightwalled cases but lose primer pockets are the big one for bottleneck. If you not careful you could have a case rupture, as the wall is getting thin down in that area. And you don't want that.
If you are seeing loose primer pockets within 3-4 loads, then you definately need to back off you load a tad. But 7 is the norm to see loose primer pockets.