I have a Sako TRG-S/995 that I was going to use for a magnum project but have changed my mind. This is a new, unfired 7mm Weatherby Mag. It has a 3 lug bolt with a mag boltface and magazine feed. This is the same basic action (with a couple differences) as the TRG. I have most of the part numbers to turn this into a TRG if you want, or McMillan has an A5 setup ready to go for it right now.
A $185 bolt will give you an action for a 338 Lapua.
$650 shipped or may consider a trade involving a high end optic