I have an opportunity to buy some 1x fired 338 Lapua brass (Lapua headstamp) for about half of what it costs new. The brass was fired in a custom gun. I have been bitten twice now by buying 1x fired brass and using it in a custom gun only to have it not fit in the chamber even after full length sizing. It has not been Lapua quality brass though. Any thoughts on this? Should I run or is there a better chance of this brass fitting in my custom Lapua after full length sizing? Thanks.