Ive been researching ways to lower my ES and SD. One of those ways included running an expander mandrel die. Ive read where i still use my bushing die without an expander before i use the expander mandrel die. I have my bushing set up for a two thou neck tension. I see that Sinclair has an expander that is .263, which is one thou less than the bullets diameter. My question is, if I start running a expander mandrel die, will I need to change my bushing? And Is there any steps that Im missing?