@Blackfern - like @Jhon said, you may well have the Lee Breechlock system on that press. Have you tried depressing the bolthead that butts up against the steel die bushing? The bushing will rotate anti-clockwise and you can pop it out. You can buy inserts that incorporate a locking to achieve exactly the same set/lock/forget that you did with the Hornady LnL system.
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