The dead length bullet seater that comes with the deluxe set does not crimp.
If you are neck sizing it's possible that some trash,grit, brass shavings or something got inside the collet preventing it from closing completely. Take the die apart and clean the collet. pay particular attention the space between the parts that close to size the neck, It wouldn't take much to make a big difference. If some sizing lube or oil or something got in there that might be all it would take to keep it from operating properly. (this just popped into my head trying to figure this out)
You can check a sized case by trying to manually insert a bullet into it instead of using the seating die to push it in. It should be very snug or difficult to insert the base of a bullet.
If you are neck sizing it's possible that some trash,grit, brass shavings or something got inside the collet preventing it from closing completely. Take the die apart and clean the collet. pay particular attention the space between the parts that close to size the neck, It wouldn't take much to make a big difference. If some sizing lube or oil or something got in there that might be all it would take to keep it from operating properly. (this just popped into my head trying to figure this out)
You can check a sized case by trying to manually insert a bullet into it instead of using the seating die to push it in. It should be very snug or difficult to insert the base of a bullet.
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