Loosen the lockrings on your seat and crimp dies, load a shell and while it is in the die with the ram FULLY raised tighten the lock rings. This will center the die in the threads and the wobble should be gone. If from there you still have wobble you need to either get another seating die with a seating stem that fits your bullet or a die that compensates for bullet types by using an alignment system like the Redding Competition Seating Die.
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