pulling

i have a bunch of factory 30-06 ammo i was thinking about pulling bullets and reusing powder and cases then just replacing bullets with some hornady's. but i am not sure how to go about it do i need to resize?

I have enough coin to pay for it in full. I am so tired of trying to scrimp and save to get money for kit so, I am bailing on the SN for the ST and hope it will work and I love it! GAP is paid for minus shipping or any hidden cost, USO is paid for, finally after 2 years of wanting and waiting...