Thread: 270wsm rl26 145g eldx my experience

The only thing I can think of is that maybe the head space in my chamber has much tighter tolerance than the rifle this round was originally fired in and no matter how much I try and re size it, it's never gone be right in my chamber due to the cartridge springing back a little once it's been through the die ?
I can't otherwise see how my head space could have shrunk ?