I bought 500 rounds of Lake City .308 brass a few years ago and just got round to reloading them and I am stumped here, they just will not go through the sizing die unless I take 5-6 passes and screw the die in progressively. It is like the chamber on the weapon they were fired in was way out of spec. Any experience with this? I have a redding single stage press. I was thinking that I lube the cases and maybe heat them in the oven (oven then lube...) and then run them through with a cheater bar on the handle of the press to get more leverage, it might work better. I have been reloading for 30 years and not had this problem ever.